diff --git a/README.md b/README.md
index c1f1318..4527c21 100644
--- a/README.md
+++ b/README.md
@@ -518,7 +518,7 @@ public partial class MyReactiveControl : UserControl
     public MyReactiveControl()
     {
         InitializeComponent();
-        MyReactiveClass = new MyReactiveClass();
+        ViewModel = new MyReactiveClass();
     }
 }
 ```
@@ -534,7 +534,7 @@ public partial class MyReactiveControl : UserControl
     public MyReactiveControl()
     {
         InitializeComponent();
-        MyReactiveClass = new MyReactiveClass();
+        ViewModel = new MyReactiveClass();
     }
 }
 ```
diff --git a/src/ReactiveUI.SourceGenerator.Tests/DERIVEDLIST/BindableDerivedListGeneratorTests.FromReactiveProperties#ReactiveUI.SourceGenerators.BindableDerivedListAttribute.g.verified.cs b/src/ReactiveUI.SourceGenerator.Tests/DERIVEDLIST/BindableDerivedListGeneratorTests.FromReactiveProperties#ReactiveUI.SourceGenerators.BindableDerivedListAttribute.g.verified.cs
index bc8d779..c126a7a 100644
--- a/src/ReactiveUI.SourceGenerator.Tests/DERIVEDLIST/BindableDerivedListGeneratorTests.FromReactiveProperties#ReactiveUI.SourceGenerators.BindableDerivedListAttribute.g.verified.cs
+++ b/src/ReactiveUI.SourceGenerator.Tests/DERIVEDLIST/BindableDerivedListGeneratorTests.FromReactiveProperties#ReactiveUI.SourceGenerators.BindableDerivedListAttribute.g.verified.cs
@@ -4,8 +4,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
 
-using System;
-
 // <auto-generated/>
 #pragma warning disable
 #nullable enable
@@ -16,6 +14,6 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [AttributeUsage(AttributeTargets.Field, AllowMultiple = false, Inherited = false)]
-internal sealed class BindableDerivedListAttribute : Attribute;
+internal sealed class BindableDerivedListAttribute : global::System.Attribute;
 #nullable restore
 #pragma warning restore
\ No newline at end of file
diff --git a/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPFromObservableGeneratorTests.FromField#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs b/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPFromObservableGeneratorTests.FromField#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
index 1ceb7dd..6f224cc 100644
--- a/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPFromObservableGeneratorTests.FromField#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
+++ b/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPFromObservableGeneratorTests.FromField#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
@@ -4,8 +4,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
 
-using System;
-
 // <auto-generated/>
 #pragma warning disable
 #nullable enable
@@ -16,7 +14,7 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [AttributeUsage(AttributeTargets.Field | AttributeTargets.Property | AttributeTargets.Method, AllowMultiple = false, Inherited = false)]
-internal sealed class ObservableAsPropertyAttribute : Attribute
+internal sealed class ObservableAsPropertyAttribute : global::System.Attribute
 {
     /// <summary>
     /// Gets the name of the property.
diff --git a/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPFromObservableGeneratorTests.FromObservableMethods#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs b/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPFromObservableGeneratorTests.FromObservableMethods#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
index 1ceb7dd..6f224cc 100644
--- a/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPFromObservableGeneratorTests.FromObservableMethods#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
+++ b/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPFromObservableGeneratorTests.FromObservableMethods#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
@@ -4,8 +4,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
 
-using System;
-
 // <auto-generated/>
 #pragma warning disable
 #nullable enable
@@ -16,7 +14,7 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [AttributeUsage(AttributeTargets.Field | AttributeTargets.Property | AttributeTargets.Method, AllowMultiple = false, Inherited = false)]
-internal sealed class ObservableAsPropertyAttribute : Attribute
+internal sealed class ObservableAsPropertyAttribute : global::System.Attribute
 {
     /// <summary>
     /// Gets the name of the property.
diff --git a/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPFromObservableGeneratorTests.FromObservableMethodsWithName#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs b/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPFromObservableGeneratorTests.FromObservableMethodsWithName#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
index 1ceb7dd..6f224cc 100644
--- a/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPFromObservableGeneratorTests.FromObservableMethodsWithName#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
+++ b/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPFromObservableGeneratorTests.FromObservableMethodsWithName#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
@@ -4,8 +4,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
 
-using System;
-
 // <auto-generated/>
 #pragma warning disable
 #nullable enable
@@ -16,7 +14,7 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [AttributeUsage(AttributeTargets.Field | AttributeTargets.Property | AttributeTargets.Method, AllowMultiple = false, Inherited = false)]
-internal sealed class ObservableAsPropertyAttribute : Attribute
+internal sealed class ObservableAsPropertyAttribute : global::System.Attribute
 {
     /// <summary>
     /// Gets the name of the property.
diff --git a/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPFromObservableGeneratorTests.FromObservableProp#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs b/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPFromObservableGeneratorTests.FromObservableProp#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
index 1ceb7dd..6f224cc 100644
--- a/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPFromObservableGeneratorTests.FromObservableProp#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
+++ b/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPFromObservableGeneratorTests.FromObservableProp#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
@@ -4,8 +4,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
 
-using System;
-
 // <auto-generated/>
 #pragma warning disable
 #nullable enable
@@ -16,7 +14,7 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [AttributeUsage(AttributeTargets.Field | AttributeTargets.Property | AttributeTargets.Method, AllowMultiple = false, Inherited = false)]
-internal sealed class ObservableAsPropertyAttribute : Attribute
+internal sealed class ObservableAsPropertyAttribute : global::System.Attribute
 {
     /// <summary>
     /// Gets the name of the property.
diff --git a/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPFromObservableGeneratorTests.FromObservablePropNestedClasses#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs b/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPFromObservableGeneratorTests.FromObservablePropNestedClasses#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
index 1ceb7dd..6f224cc 100644
--- a/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPFromObservableGeneratorTests.FromObservablePropNestedClasses#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
+++ b/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPFromObservableGeneratorTests.FromObservablePropNestedClasses#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
@@ -4,8 +4,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
 
-using System;
-
 // <auto-generated/>
 #pragma warning disable
 #nullable enable
@@ -16,7 +14,7 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [AttributeUsage(AttributeTargets.Field | AttributeTargets.Property | AttributeTargets.Method, AllowMultiple = false, Inherited = false)]
-internal sealed class ObservableAsPropertyAttribute : Attribute
+internal sealed class ObservableAsPropertyAttribute : global::System.Attribute
 {
     /// <summary>
     /// Gets the name of the property.
diff --git a/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPFromObservableGeneratorTests.FromObservablePropertiesWithAttribute#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs b/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPFromObservableGeneratorTests.FromObservablePropertiesWithAttribute#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
index 1ceb7dd..6f224cc 100644
--- a/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPFromObservableGeneratorTests.FromObservablePropertiesWithAttribute#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
+++ b/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPFromObservableGeneratorTests.FromObservablePropertiesWithAttribute#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
@@ -4,8 +4,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
 
-using System;
-
 // <auto-generated/>
 #pragma warning disable
 #nullable enable
@@ -16,7 +14,7 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [AttributeUsage(AttributeTargets.Field | AttributeTargets.Property | AttributeTargets.Method, AllowMultiple = false, Inherited = false)]
-internal sealed class ObservableAsPropertyAttribute : Attribute
+internal sealed class ObservableAsPropertyAttribute : global::System.Attribute
 {
     /// <summary>
     /// Gets the name of the property.
diff --git a/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPFromObservableGeneratorTests.FromObservablePropertiesWithAttributeNullableRef#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs b/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPFromObservableGeneratorTests.FromObservablePropertiesWithAttributeNullableRef#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
index 1ceb7dd..6f224cc 100644
--- a/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPFromObservableGeneratorTests.FromObservablePropertiesWithAttributeNullableRef#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
+++ b/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPFromObservableGeneratorTests.FromObservablePropertiesWithAttributeNullableRef#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
@@ -4,8 +4,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
 
-using System;
-
 // <auto-generated/>
 #pragma warning disable
 #nullable enable
@@ -16,7 +14,7 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [AttributeUsage(AttributeTargets.Field | AttributeTargets.Property | AttributeTargets.Method, AllowMultiple = false, Inherited = false)]
-internal sealed class ObservableAsPropertyAttribute : Attribute
+internal sealed class ObservableAsPropertyAttribute : global::System.Attribute
 {
     /// <summary>
     /// Gets the name of the property.
diff --git a/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPFromObservableGeneratorTests.FromObservablePropertiesWithAttributeRef#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs b/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPFromObservableGeneratorTests.FromObservablePropertiesWithAttributeRef#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
index 1ceb7dd..6f224cc 100644
--- a/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPFromObservableGeneratorTests.FromObservablePropertiesWithAttributeRef#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
+++ b/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPFromObservableGeneratorTests.FromObservablePropertiesWithAttributeRef#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
@@ -4,8 +4,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
 
-using System;
-
 // <auto-generated/>
 #pragma warning disable
 #nullable enable
@@ -16,7 +14,7 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [AttributeUsage(AttributeTargets.Field | AttributeTargets.Property | AttributeTargets.Method, AllowMultiple = false, Inherited = false)]
-internal sealed class ObservableAsPropertyAttribute : Attribute
+internal sealed class ObservableAsPropertyAttribute : global::System.Attribute
 {
     /// <summary>
     /// Gets the name of the property.
diff --git a/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPFromObservableGeneratorTests.FromObservablePropertiesWithName#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs b/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPFromObservableGeneratorTests.FromObservablePropertiesWithName#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
index 1ceb7dd..6f224cc 100644
--- a/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPFromObservableGeneratorTests.FromObservablePropertiesWithName#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
+++ b/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPFromObservableGeneratorTests.FromObservablePropertiesWithName#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
@@ -4,8 +4,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
 
-using System;
-
 // <auto-generated/>
 #pragma warning disable
 #nullable enable
@@ -16,7 +14,7 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [AttributeUsage(AttributeTargets.Field | AttributeTargets.Property | AttributeTargets.Method, AllowMultiple = false, Inherited = false)]
-internal sealed class ObservableAsPropertyAttribute : Attribute
+internal sealed class ObservableAsPropertyAttribute : global::System.Attribute
 {
     /// <summary>
     /// Gets the name of the property.
diff --git a/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPFromObservableGeneratorTests.FromPartialProperty#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs b/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPFromObservableGeneratorTests.FromPartialProperty#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
index 1ceb7dd..6f224cc 100644
--- a/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPFromObservableGeneratorTests.FromPartialProperty#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
+++ b/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPFromObservableGeneratorTests.FromPartialProperty#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
@@ -4,8 +4,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
 
-using System;
-
 // <auto-generated/>
 #pragma warning disable
 #nullable enable
@@ -16,7 +14,7 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [AttributeUsage(AttributeTargets.Field | AttributeTargets.Property | AttributeTargets.Method, AllowMultiple = false, Inherited = false)]
-internal sealed class ObservableAsPropertyAttribute : Attribute
+internal sealed class ObservableAsPropertyAttribute : global::System.Attribute
 {
     /// <summary>
     /// Gets the name of the property.
diff --git a/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPGeneratorTests.FromField#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs b/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPGeneratorTests.FromField#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
index 1ceb7dd..6f224cc 100644
--- a/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPGeneratorTests.FromField#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
+++ b/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPGeneratorTests.FromField#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
@@ -4,8 +4,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
 
-using System;
-
 // <auto-generated/>
 #pragma warning disable
 #nullable enable
@@ -16,7 +14,7 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [AttributeUsage(AttributeTargets.Field | AttributeTargets.Property | AttributeTargets.Method, AllowMultiple = false, Inherited = false)]
-internal sealed class ObservableAsPropertyAttribute : Attribute
+internal sealed class ObservableAsPropertyAttribute : global::System.Attribute
 {
     /// <summary>
     /// Gets the name of the property.
diff --git a/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPGeneratorTests.FromFieldNestedClass#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs b/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPGeneratorTests.FromFieldNestedClass#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
index 1ceb7dd..6f224cc 100644
--- a/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPGeneratorTests.FromFieldNestedClass#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
+++ b/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPGeneratorTests.FromFieldNestedClass#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
@@ -4,8 +4,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
 
-using System;
-
 // <auto-generated/>
 #pragma warning disable
 #nullable enable
@@ -16,7 +14,7 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [AttributeUsage(AttributeTargets.Field | AttributeTargets.Property | AttributeTargets.Method, AllowMultiple = false, Inherited = false)]
-internal sealed class ObservableAsPropertyAttribute : Attribute
+internal sealed class ObservableAsPropertyAttribute : global::System.Attribute
 {
     /// <summary>
     /// Gets the name of the property.
diff --git a/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPGeneratorTests.NamedFromField#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs b/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPGeneratorTests.NamedFromField#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
index 1ceb7dd..6f224cc 100644
--- a/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPGeneratorTests.NamedFromField#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
+++ b/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPGeneratorTests.NamedFromField#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
@@ -4,8 +4,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
 
-using System;
-
 // <auto-generated/>
 #pragma warning disable
 #nullable enable
@@ -16,7 +14,7 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [AttributeUsage(AttributeTargets.Field | AttributeTargets.Property | AttributeTargets.Method, AllowMultiple = false, Inherited = false)]
-internal sealed class ObservableAsPropertyAttribute : Attribute
+internal sealed class ObservableAsPropertyAttribute : global::System.Attribute
 {
     /// <summary>
     /// Gets the name of the property.
diff --git a/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPGeneratorTests.NonReadOnlyFromField#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs b/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPGeneratorTests.NonReadOnlyFromField#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
index 1ceb7dd..6f224cc 100644
--- a/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPGeneratorTests.NonReadOnlyFromField#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
+++ b/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPGeneratorTests.NonReadOnlyFromField#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
@@ -4,8 +4,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
 
-using System;
-
 // <auto-generated/>
 #pragma warning disable
 #nullable enable
@@ -16,7 +14,7 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [AttributeUsage(AttributeTargets.Field | AttributeTargets.Property | AttributeTargets.Method, AllowMultiple = false, Inherited = false)]
-internal sealed class ObservableAsPropertyAttribute : Attribute
+internal sealed class ObservableAsPropertyAttribute : global::System.Attribute
 {
     /// <summary>
     /// Gets the name of the property.
diff --git a/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPGeneratorTests.NonReadOnlyFromFieldProtected#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs b/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPGeneratorTests.NonReadOnlyFromFieldProtected#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
index 1ceb7dd..6f224cc 100644
--- a/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPGeneratorTests.NonReadOnlyFromFieldProtected#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
+++ b/src/ReactiveUI.SourceGenerator.Tests/OAPH/OAPGeneratorTests.NonReadOnlyFromFieldProtected#ReactiveUI.SourceGenerators.ObservableAsPropertyAttribute.g.verified.cs
@@ -4,8 +4,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
 
-using System;
-
 // <auto-generated/>
 #pragma warning disable
 #nullable enable
@@ -16,7 +14,7 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [AttributeUsage(AttributeTargets.Field | AttributeTargets.Property | AttributeTargets.Method, AllowMultiple = false, Inherited = false)]
-internal sealed class ObservableAsPropertyAttribute : Attribute
+internal sealed class ObservableAsPropertyAttribute : global::System.Attribute
 {
     /// <summary>
     /// Gets the name of the property.
diff --git a/src/ReactiveUI.SourceGenerator.Tests/REACTIVE/ReactiveGeneratorTests.FromReactivePartialProperties#ReactiveUI.SourceGenerators.ReactiveAttribute.g.verified.cs b/src/ReactiveUI.SourceGenerator.Tests/REACTIVE/ReactiveGeneratorTests.FromReactivePartialProperties#ReactiveUI.SourceGenerators.ReactiveAttribute.g.verified.cs
index a13d64c..f67e6a7 100644
--- a/src/ReactiveUI.SourceGenerator.Tests/REACTIVE/ReactiveGeneratorTests.FromReactivePartialProperties#ReactiveUI.SourceGenerators.ReactiveAttribute.g.verified.cs
+++ b/src/ReactiveUI.SourceGenerator.Tests/REACTIVE/ReactiveGeneratorTests.FromReactivePartialProperties#ReactiveUI.SourceGenerators.ReactiveAttribute.g.verified.cs
@@ -4,8 +4,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
 
-using System;
-
 // <auto-generated/>
 #pragma warning disable
 #nullable enable
@@ -16,7 +14,7 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [AttributeUsage(AttributeTargets.Field | AttributeTargets.Property, AllowMultiple = false, Inherited = false)]
-internal sealed class ReactiveAttribute : Attribute
+internal sealed class ReactiveAttribute : global::System.Attribute
 {
     /// <summary>
     /// Gets the AccessModifier of the set property.
diff --git a/src/ReactiveUI.SourceGenerator.Tests/REACTIVE/ReactiveGeneratorTests.FromReactiveProperiesWithAttributes#ReactiveUI.SourceGenerators.ReactiveAttribute.g.verified.cs b/src/ReactiveUI.SourceGenerator.Tests/REACTIVE/ReactiveGeneratorTests.FromReactiveProperiesWithAttributes#ReactiveUI.SourceGenerators.ReactiveAttribute.g.verified.cs
index a13d64c..f67e6a7 100644
--- a/src/ReactiveUI.SourceGenerator.Tests/REACTIVE/ReactiveGeneratorTests.FromReactiveProperiesWithAttributes#ReactiveUI.SourceGenerators.ReactiveAttribute.g.verified.cs
+++ b/src/ReactiveUI.SourceGenerator.Tests/REACTIVE/ReactiveGeneratorTests.FromReactiveProperiesWithAttributes#ReactiveUI.SourceGenerators.ReactiveAttribute.g.verified.cs
@@ -4,8 +4,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
 
-using System;
-
 // <auto-generated/>
 #pragma warning disable
 #nullable enable
@@ -16,7 +14,7 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [AttributeUsage(AttributeTargets.Field | AttributeTargets.Property, AllowMultiple = false, Inherited = false)]
-internal sealed class ReactiveAttribute : Attribute
+internal sealed class ReactiveAttribute : global::System.Attribute
 {
     /// <summary>
     /// Gets the AccessModifier of the set property.
diff --git a/src/ReactiveUI.SourceGenerator.Tests/REACTIVE/ReactiveGeneratorTests.FromReactiveProperties#ReactiveUI.SourceGenerators.ReactiveAttribute.g.verified.cs b/src/ReactiveUI.SourceGenerator.Tests/REACTIVE/ReactiveGeneratorTests.FromReactiveProperties#ReactiveUI.SourceGenerators.ReactiveAttribute.g.verified.cs
index a13d64c..f67e6a7 100644
--- a/src/ReactiveUI.SourceGenerator.Tests/REACTIVE/ReactiveGeneratorTests.FromReactiveProperties#ReactiveUI.SourceGenerators.ReactiveAttribute.g.verified.cs
+++ b/src/ReactiveUI.SourceGenerator.Tests/REACTIVE/ReactiveGeneratorTests.FromReactiveProperties#ReactiveUI.SourceGenerators.ReactiveAttribute.g.verified.cs
@@ -4,8 +4,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
 
-using System;
-
 // <auto-generated/>
 #pragma warning disable
 #nullable enable
@@ -16,7 +14,7 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [AttributeUsage(AttributeTargets.Field | AttributeTargets.Property, AllowMultiple = false, Inherited = false)]
-internal sealed class ReactiveAttribute : Attribute
+internal sealed class ReactiveAttribute : global::System.Attribute
 {
     /// <summary>
     /// Gets the AccessModifier of the set property.
diff --git a/src/ReactiveUI.SourceGenerator.Tests/REACTIVE/ReactiveGeneratorTests.FromReactivePropertiesCalledValue#ReactiveUI.SourceGenerators.ReactiveAttribute.g.verified.cs b/src/ReactiveUI.SourceGenerator.Tests/REACTIVE/ReactiveGeneratorTests.FromReactivePropertiesCalledValue#ReactiveUI.SourceGenerators.ReactiveAttribute.g.verified.cs
index a13d64c..f67e6a7 100644
--- a/src/ReactiveUI.SourceGenerator.Tests/REACTIVE/ReactiveGeneratorTests.FromReactivePropertiesCalledValue#ReactiveUI.SourceGenerators.ReactiveAttribute.g.verified.cs
+++ b/src/ReactiveUI.SourceGenerator.Tests/REACTIVE/ReactiveGeneratorTests.FromReactivePropertiesCalledValue#ReactiveUI.SourceGenerators.ReactiveAttribute.g.verified.cs
@@ -4,8 +4,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
 
-using System;
-
 // <auto-generated/>
 #pragma warning disable
 #nullable enable
@@ -16,7 +14,7 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [AttributeUsage(AttributeTargets.Field | AttributeTargets.Property, AllowMultiple = false, Inherited = false)]
-internal sealed class ReactiveAttribute : Attribute
+internal sealed class ReactiveAttribute : global::System.Attribute
 {
     /// <summary>
     /// Gets the AccessModifier of the set property.
diff --git a/src/ReactiveUI.SourceGenerator.Tests/REACTIVE/ReactiveGeneratorTests.FromReactivePropertiesWithAccess#ReactiveUI.SourceGenerators.ReactiveAttribute.g.verified.cs b/src/ReactiveUI.SourceGenerator.Tests/REACTIVE/ReactiveGeneratorTests.FromReactivePropertiesWithAccess#ReactiveUI.SourceGenerators.ReactiveAttribute.g.verified.cs
index a13d64c..f67e6a7 100644
--- a/src/ReactiveUI.SourceGenerator.Tests/REACTIVE/ReactiveGeneratorTests.FromReactivePropertiesWithAccess#ReactiveUI.SourceGenerators.ReactiveAttribute.g.verified.cs
+++ b/src/ReactiveUI.SourceGenerator.Tests/REACTIVE/ReactiveGeneratorTests.FromReactivePropertiesWithAccess#ReactiveUI.SourceGenerators.ReactiveAttribute.g.verified.cs
@@ -4,8 +4,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
 
-using System;
-
 // <auto-generated/>
 #pragma warning disable
 #nullable enable
@@ -16,7 +14,7 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [AttributeUsage(AttributeTargets.Field | AttributeTargets.Property, AllowMultiple = false, Inherited = false)]
-internal sealed class ReactiveAttribute : Attribute
+internal sealed class ReactiveAttribute : global::System.Attribute
 {
     /// <summary>
     /// Gets the AccessModifier of the set property.
diff --git a/src/ReactiveUI.SourceGenerator.Tests/REACTIVE/ReactiveGeneratorTests.FromReactivePropertiesWithAttributesAccessAndInheritance#ReactiveUI.SourceGenerators.ReactiveAttribute.g.verified.cs b/src/ReactiveUI.SourceGenerator.Tests/REACTIVE/ReactiveGeneratorTests.FromReactivePropertiesWithAttributesAccessAndInheritance#ReactiveUI.SourceGenerators.ReactiveAttribute.g.verified.cs
index a13d64c..f67e6a7 100644
--- a/src/ReactiveUI.SourceGenerator.Tests/REACTIVE/ReactiveGeneratorTests.FromReactivePropertiesWithAttributesAccessAndInheritance#ReactiveUI.SourceGenerators.ReactiveAttribute.g.verified.cs
+++ b/src/ReactiveUI.SourceGenerator.Tests/REACTIVE/ReactiveGeneratorTests.FromReactivePropertiesWithAttributesAccessAndInheritance#ReactiveUI.SourceGenerators.ReactiveAttribute.g.verified.cs
@@ -4,8 +4,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
 
-using System;
-
 // <auto-generated/>
 #pragma warning disable
 #nullable enable
@@ -16,7 +14,7 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [AttributeUsage(AttributeTargets.Field | AttributeTargets.Property, AllowMultiple = false, Inherited = false)]
-internal sealed class ReactiveAttribute : Attribute
+internal sealed class ReactiveAttribute : global::System.Attribute
 {
     /// <summary>
     /// Gets the AccessModifier of the set property.
diff --git a/src/ReactiveUI.SourceGenerator.Tests/REACTIVE/ReactiveGeneratorTests.FromReactivePropertiesWithIdenticalClass#ReactiveUI.SourceGenerators.ReactiveAttribute.g.verified.cs b/src/ReactiveUI.SourceGenerator.Tests/REACTIVE/ReactiveGeneratorTests.FromReactivePropertiesWithIdenticalClass#ReactiveUI.SourceGenerators.ReactiveAttribute.g.verified.cs
index a13d64c..f67e6a7 100644
--- a/src/ReactiveUI.SourceGenerator.Tests/REACTIVE/ReactiveGeneratorTests.FromReactivePropertiesWithIdenticalClass#ReactiveUI.SourceGenerators.ReactiveAttribute.g.verified.cs
+++ b/src/ReactiveUI.SourceGenerator.Tests/REACTIVE/ReactiveGeneratorTests.FromReactivePropertiesWithIdenticalClass#ReactiveUI.SourceGenerators.ReactiveAttribute.g.verified.cs
@@ -4,8 +4,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
 
-using System;
-
 // <auto-generated/>
 #pragma warning disable
 #nullable enable
@@ -16,7 +14,7 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [AttributeUsage(AttributeTargets.Field | AttributeTargets.Property, AllowMultiple = false, Inherited = false)]
-internal sealed class ReactiveAttribute : Attribute
+internal sealed class ReactiveAttribute : global::System.Attribute
 {
     /// <summary>
     /// Gets the AccessModifier of the set property.
diff --git a/src/ReactiveUI.SourceGenerator.Tests/REACTIVE/ReactiveGeneratorTests.FromReactivePropertiesWithInit#ReactiveUI.SourceGenerators.ReactiveAttribute.g.verified.cs b/src/ReactiveUI.SourceGenerator.Tests/REACTIVE/ReactiveGeneratorTests.FromReactivePropertiesWithInit#ReactiveUI.SourceGenerators.ReactiveAttribute.g.verified.cs
index a13d64c..f67e6a7 100644
--- a/src/ReactiveUI.SourceGenerator.Tests/REACTIVE/ReactiveGeneratorTests.FromReactivePropertiesWithInit#ReactiveUI.SourceGenerators.ReactiveAttribute.g.verified.cs
+++ b/src/ReactiveUI.SourceGenerator.Tests/REACTIVE/ReactiveGeneratorTests.FromReactivePropertiesWithInit#ReactiveUI.SourceGenerators.ReactiveAttribute.g.verified.cs
@@ -4,8 +4,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
 
-using System;
-
 // <auto-generated/>
 #pragma warning disable
 #nullable enable
@@ -16,7 +14,7 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [AttributeUsage(AttributeTargets.Field | AttributeTargets.Property, AllowMultiple = false, Inherited = false)]
-internal sealed class ReactiveAttribute : Attribute
+internal sealed class ReactiveAttribute : global::System.Attribute
 {
     /// <summary>
     /// Gets the AccessModifier of the set property.
diff --git a/src/ReactiveUI.SourceGenerator.Tests/REACTIVE/ReactiveGeneratorTests.FromReactivePropertiesWithNestedClass#ReactiveUI.SourceGenerators.ReactiveAttribute.g.verified.cs b/src/ReactiveUI.SourceGenerator.Tests/REACTIVE/ReactiveGeneratorTests.FromReactivePropertiesWithNestedClass#ReactiveUI.SourceGenerators.ReactiveAttribute.g.verified.cs
index a13d64c..f67e6a7 100644
--- a/src/ReactiveUI.SourceGenerator.Tests/REACTIVE/ReactiveGeneratorTests.FromReactivePropertiesWithNestedClass#ReactiveUI.SourceGenerators.ReactiveAttribute.g.verified.cs
+++ b/src/ReactiveUI.SourceGenerator.Tests/REACTIVE/ReactiveGeneratorTests.FromReactivePropertiesWithNestedClass#ReactiveUI.SourceGenerators.ReactiveAttribute.g.verified.cs
@@ -4,8 +4,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
 
-using System;
-
 // <auto-generated/>
 #pragma warning disable
 #nullable enable
@@ -16,7 +14,7 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [AttributeUsage(AttributeTargets.Field | AttributeTargets.Property, AllowMultiple = false, Inherited = false)]
-internal sealed class ReactiveAttribute : Attribute
+internal sealed class ReactiveAttribute : global::System.Attribute
 {
     /// <summary>
     /// Gets the AccessModifier of the set property.
diff --git a/src/ReactiveUI.SourceGenerator.Tests/REACTIVECMD/ReactiveCMDGeneratorTests.FromReactiveAsyncCommand#ReactiveUI.SourceGenerators.ReactiveCommandAttribute.g.verified.cs b/src/ReactiveUI.SourceGenerator.Tests/REACTIVECMD/ReactiveCMDGeneratorTests.FromReactiveAsyncCommand#ReactiveUI.SourceGenerators.ReactiveCommandAttribute.g.verified.cs
index d2aeb2b..bb2da90 100644
--- a/src/ReactiveUI.SourceGenerator.Tests/REACTIVECMD/ReactiveCMDGeneratorTests.FromReactiveAsyncCommand#ReactiveUI.SourceGenerators.ReactiveCommandAttribute.g.verified.cs
+++ b/src/ReactiveUI.SourceGenerator.Tests/REACTIVECMD/ReactiveCMDGeneratorTests.FromReactiveAsyncCommand#ReactiveUI.SourceGenerators.ReactiveCommandAttribute.g.verified.cs
@@ -4,8 +4,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
 
-using System;
-
 // <auto-generated/>
 #pragma warning disable
 #nullable enable
@@ -16,7 +14,7 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [AttributeUsage(AttributeTargets.Method, AllowMultiple = false, Inherited = false)]
-internal sealed class ReactiveCommandAttribute : Attribute
+internal sealed class ReactiveCommandAttribute : global::System.Attribute
 {
     /// <summary>
     /// Gets the can execute method or property.
diff --git a/src/ReactiveUI.SourceGenerator.Tests/REACTIVECMD/ReactiveCMDGeneratorTests.FromReactiveAsyncCommandWithParameter#ReactiveUI.SourceGenerators.ReactiveCommandAttribute.g.verified.cs b/src/ReactiveUI.SourceGenerator.Tests/REACTIVECMD/ReactiveCMDGeneratorTests.FromReactiveAsyncCommandWithParameter#ReactiveUI.SourceGenerators.ReactiveCommandAttribute.g.verified.cs
index d2aeb2b..bb2da90 100644
--- a/src/ReactiveUI.SourceGenerator.Tests/REACTIVECMD/ReactiveCMDGeneratorTests.FromReactiveAsyncCommandWithParameter#ReactiveUI.SourceGenerators.ReactiveCommandAttribute.g.verified.cs
+++ b/src/ReactiveUI.SourceGenerator.Tests/REACTIVECMD/ReactiveCMDGeneratorTests.FromReactiveAsyncCommandWithParameter#ReactiveUI.SourceGenerators.ReactiveCommandAttribute.g.verified.cs
@@ -4,8 +4,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
 
-using System;
-
 // <auto-generated/>
 #pragma warning disable
 #nullable enable
@@ -16,7 +14,7 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [AttributeUsage(AttributeTargets.Method, AllowMultiple = false, Inherited = false)]
-internal sealed class ReactiveCommandAttribute : Attribute
+internal sealed class ReactiveCommandAttribute : global::System.Attribute
 {
     /// <summary>
     /// Gets the can execute method or property.
diff --git a/src/ReactiveUI.SourceGenerator.Tests/REACTIVECMD/ReactiveCMDGeneratorTests.FromReactiveCommand#ReactiveUI.SourceGenerators.ReactiveCommandAttribute.g.verified.cs b/src/ReactiveUI.SourceGenerator.Tests/REACTIVECMD/ReactiveCMDGeneratorTests.FromReactiveCommand#ReactiveUI.SourceGenerators.ReactiveCommandAttribute.g.verified.cs
index d2aeb2b..bb2da90 100644
--- a/src/ReactiveUI.SourceGenerator.Tests/REACTIVECMD/ReactiveCMDGeneratorTests.FromReactiveCommand#ReactiveUI.SourceGenerators.ReactiveCommandAttribute.g.verified.cs
+++ b/src/ReactiveUI.SourceGenerator.Tests/REACTIVECMD/ReactiveCMDGeneratorTests.FromReactiveCommand#ReactiveUI.SourceGenerators.ReactiveCommandAttribute.g.verified.cs
@@ -4,8 +4,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
 
-using System;
-
 // <auto-generated/>
 #pragma warning disable
 #nullable enable
@@ -16,7 +14,7 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [AttributeUsage(AttributeTargets.Method, AllowMultiple = false, Inherited = false)]
-internal sealed class ReactiveCommandAttribute : Attribute
+internal sealed class ReactiveCommandAttribute : global::System.Attribute
 {
     /// <summary>
     /// Gets the can execute method or property.
diff --git a/src/ReactiveUI.SourceGenerator.Tests/REACTIVECMD/ReactiveCMDGeneratorTests.FromReactiveCommandWithNestedClasses#ReactiveUI.SourceGenerators.ReactiveCommandAttribute.g.verified.cs b/src/ReactiveUI.SourceGenerator.Tests/REACTIVECMD/ReactiveCMDGeneratorTests.FromReactiveCommandWithNestedClasses#ReactiveUI.SourceGenerators.ReactiveCommandAttribute.g.verified.cs
index d2aeb2b..bb2da90 100644
--- a/src/ReactiveUI.SourceGenerator.Tests/REACTIVECMD/ReactiveCMDGeneratorTests.FromReactiveCommandWithNestedClasses#ReactiveUI.SourceGenerators.ReactiveCommandAttribute.g.verified.cs
+++ b/src/ReactiveUI.SourceGenerator.Tests/REACTIVECMD/ReactiveCMDGeneratorTests.FromReactiveCommandWithNestedClasses#ReactiveUI.SourceGenerators.ReactiveCommandAttribute.g.verified.cs
@@ -4,8 +4,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
 
-using System;
-
 // <auto-generated/>
 #pragma warning disable
 #nullable enable
@@ -16,7 +14,7 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [AttributeUsage(AttributeTargets.Method, AllowMultiple = false, Inherited = false)]
-internal sealed class ReactiveCommandAttribute : Attribute
+internal sealed class ReactiveCommandAttribute : global::System.Attribute
 {
     /// <summary>
     /// Gets the can execute method or property.
diff --git a/src/ReactiveUI.SourceGenerator.Tests/REACTIVECMD/ReactiveCMDGeneratorTests.FromReactiveCommandWithOutputScheduler#ReactiveUI.SourceGenerators.ReactiveCommandAttribute.g.verified.cs b/src/ReactiveUI.SourceGenerator.Tests/REACTIVECMD/ReactiveCMDGeneratorTests.FromReactiveCommandWithOutputScheduler#ReactiveUI.SourceGenerators.ReactiveCommandAttribute.g.verified.cs
index d2aeb2b..bb2da90 100644
--- a/src/ReactiveUI.SourceGenerator.Tests/REACTIVECMD/ReactiveCMDGeneratorTests.FromReactiveCommandWithOutputScheduler#ReactiveUI.SourceGenerators.ReactiveCommandAttribute.g.verified.cs
+++ b/src/ReactiveUI.SourceGenerator.Tests/REACTIVECMD/ReactiveCMDGeneratorTests.FromReactiveCommandWithOutputScheduler#ReactiveUI.SourceGenerators.ReactiveCommandAttribute.g.verified.cs
@@ -4,8 +4,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
 
-using System;
-
 // <auto-generated/>
 #pragma warning disable
 #nullable enable
@@ -16,7 +14,7 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [AttributeUsage(AttributeTargets.Method, AllowMultiple = false, Inherited = false)]
-internal sealed class ReactiveCommandAttribute : Attribute
+internal sealed class ReactiveCommandAttribute : global::System.Attribute
 {
     /// <summary>
     /// Gets the can execute method or property.
diff --git a/src/ReactiveUI.SourceGenerator.Tests/REACTIVECMD/ReactiveCMDGeneratorTests.FromReactiveCommandWithParameter#ReactiveUI.SourceGenerators.ReactiveCommandAttribute.g.verified.cs b/src/ReactiveUI.SourceGenerator.Tests/REACTIVECMD/ReactiveCMDGeneratorTests.FromReactiveCommandWithParameter#ReactiveUI.SourceGenerators.ReactiveCommandAttribute.g.verified.cs
index d2aeb2b..bb2da90 100644
--- a/src/ReactiveUI.SourceGenerator.Tests/REACTIVECMD/ReactiveCMDGeneratorTests.FromReactiveCommandWithParameter#ReactiveUI.SourceGenerators.ReactiveCommandAttribute.g.verified.cs
+++ b/src/ReactiveUI.SourceGenerator.Tests/REACTIVECMD/ReactiveCMDGeneratorTests.FromReactiveCommandWithParameter#ReactiveUI.SourceGenerators.ReactiveCommandAttribute.g.verified.cs
@@ -4,8 +4,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
 
-using System;
-
 // <auto-generated/>
 #pragma warning disable
 #nullable enable
@@ -16,7 +14,7 @@ namespace ReactiveUI.SourceGenerators;
 /// </summary>
 /// <seealso cref="Attribute" />
 [AttributeUsage(AttributeTargets.Method, AllowMultiple = false, Inherited = false)]
-internal sealed class ReactiveCommandAttribute : Attribute
+internal sealed class ReactiveCommandAttribute : global::System.Attribute
 {
     /// <summary>
     /// Gets the can execute method or property.
diff --git a/src/ReactiveUI.SourceGenerators.Execute/TestViewModel.cs b/src/ReactiveUI.SourceGenerators.Execute/TestViewModel.cs
index b7c9b25..90e2baf 100644
--- a/src/ReactiveUI.SourceGenerators.Execute/TestViewModel.cs
+++ b/src/ReactiveUI.SourceGenerators.Execute/TestViewModel.cs
@@ -87,6 +87,7 @@ public partial class TestViewModel : ReactiveObject, IActivatableViewModel, IDis
     [SetsRequiredMembers]
     public TestViewModel()
     {
+        var internalTestViewModel = new InternalTestViewModel() { PublicRequiredPartialPropertyTest = true };
         MustBeSet = "Test";
         this.WhenActivated(disposables =>
         {
diff --git a/src/ReactiveUI.SourceGenerators.Roslyn/AttributeDefinitions.cs b/src/ReactiveUI.SourceGenerators.Roslyn/AttributeDefinitions.cs
index a4802f5..89fd4c0 100644
--- a/src/ReactiveUI.SourceGenerators.Roslyn/AttributeDefinitions.cs
+++ b/src/ReactiveUI.SourceGenerators.Roslyn/AttributeDefinitions.cs
@@ -1,4 +1,4 @@
-// Copyright (c) 2024 .NET Foundation and Contributors. All rights reserved.
+// Copyright (c) 2025 .NET Foundation and Contributors. All rights reserved.
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
@@ -62,8 +62,6 @@ internal enum InheritanceModifier
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
 
-using System;
-
 // <auto-generated/>
 #pragma warning disable
 #nullable enable
@@ -75,7 +73,7 @@ namespace ReactiveUI.SourceGenerators;
 /// <seealso cref="System.Attribute" />
 [global::System.CodeDom.Compiler.GeneratedCode("ReactiveUI.SourceGenerators.IViewForGenerator", "1.1.0.0")]
 [AttributeUsage(AttributeTargets.Class, AllowMultiple = false, Inherited = false)]
-internal sealed class ReactiveObjectAttribute : Attribute;
+internal sealed class ReactiveObjectAttribute : global::System.Attribute;
 #nullable restore
 #pragma warning restore
 """;
@@ -94,8 +92,6 @@ internal sealed class ReactiveObjectAttribute : Attribute;
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
 
-using System;
-
 // <auto-generated/>
 #pragma warning disable
 #nullable enable
@@ -107,7 +103,7 @@ namespace ReactiveUI.SourceGenerators;
 /// <seealso cref="Attribute" />
 [global::System.CodeDom.Compiler.GeneratedCode("ReactiveUI.SourceGenerators.ReactiveCommandGenerator", "1.1.0.0")]
 [AttributeUsage(AttributeTargets.Method, AllowMultiple = false, Inherited = false)]
-internal sealed class ReactiveCommandAttribute : Attribute
+internal sealed class ReactiveCommandAttribute : global::System.Attribute
 {
     /// <summary>
     /// Gets the can execute method or property.
@@ -144,8 +140,6 @@ internal sealed class ReactiveCommandAttribute : Attribute
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
 
-using System;
-
 // <auto-generated/>
 #pragma warning disable
 #nullable enable
@@ -157,7 +151,7 @@ namespace ReactiveUI.SourceGenerators;
 /// <seealso cref="Attribute" />
 [global::System.CodeDom.Compiler.GeneratedCode("{{ReactiveGenerator.GeneratorName}}", "{{ReactiveGenerator.GeneratorVersion}}")]
 [AttributeUsage(AttributeTargets.Field | AttributeTargets.Property, AllowMultiple = false, Inherited = false)]
-internal sealed class ReactiveAttribute : Attribute
+internal sealed class ReactiveAttribute : global::System.Attribute
 {
     /// <summary>
     /// Gets the AccessModifier of the set property.
@@ -187,8 +181,6 @@ internal sealed class ReactiveAttribute : Attribute
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
 
-using System;
-
 // <auto-generated/>
 #pragma warning disable
 #nullable enable
@@ -200,7 +192,7 @@ namespace ReactiveUI.SourceGenerators;
 /// <seealso cref="Attribute" />
 [global::System.CodeDom.Compiler.GeneratedCode("{{ReactiveGenerator.GeneratorName}}", "{{ReactiveGenerator.GeneratorVersion}}")]
 [AttributeUsage(AttributeTargets.Field, AllowMultiple = false, Inherited = false)]
-internal sealed class ReactiveAttribute : Attribute
+internal sealed class ReactiveAttribute : global::System.Attribute
 {
     /// <summary>
     /// Gets the AccessModifier of the set property.
@@ -233,8 +225,6 @@ internal sealed class ReactiveAttribute : Attribute
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
 
-using System;
-
 // <auto-generated/>
 #pragma warning disable
 #nullable enable
@@ -246,7 +236,7 @@ namespace ReactiveUI.SourceGenerators;
 /// <seealso cref="Attribute" />
 [global::System.CodeDom.Compiler.GeneratedCode("ReactiveUI.SourceGenerators.ObservableAsPropertyGenerator", "1.1.0.0")]
 [AttributeUsage(AttributeTargets.Field | AttributeTargets.Property | AttributeTargets.Method, AllowMultiple = false, Inherited = false)]
-internal sealed class ObservableAsPropertyAttribute : Attribute
+internal sealed class ObservableAsPropertyAttribute : global::System.Attribute
 {
     /// <summary>
     /// Gets the name of the property.
@@ -290,8 +280,6 @@ internal sealed class ObservableAsPropertyAttribute : Attribute
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
 
-using System;
-
 // <auto-generated/>
 #pragma warning disable
 #nullable enable
@@ -303,7 +291,7 @@ namespace ReactiveUI.SourceGenerators;
 /// <seealso cref="Attribute" />
 [global::System.CodeDom.Compiler.GeneratedCode("ReactiveUI.SourceGenerators.ObservableAsPropertyGenerator", "1.1.0.0")]
 [AttributeUsage(AttributeTargets.Field | AttributeTargets.Property | AttributeTargets.Method, AllowMultiple = false, Inherited = false)]
-internal sealed class ObservableAsPropertyAttribute : Attribute
+internal sealed class ObservableAsPropertyAttribute : global::System.Attribute
 {
     /// <summary>
     /// Gets the name of the property.
@@ -341,8 +329,6 @@ internal sealed class ObservableAsPropertyAttribute : Attribute
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
 
-using System;
-
 // <auto-generated/>
 #pragma warning disable
 #nullable enable
@@ -358,7 +344,7 @@ namespace ReactiveUI.SourceGenerators;
 /// <param name="viewModelType">Type of the view model.</param>
 [global::System.CodeDom.Compiler.GeneratedCode("ReactiveUI.SourceGenerators.IViewForGenerator", "1.1.0.0")]
 [AttributeUsage(AttributeTargets.Class, AllowMultiple = false, Inherited = false)]
-internal sealed class IViewForAttribute<T> : Attribute;
+internal sealed class IViewForAttribute<T> : global::System.Attribute;
 
 /// <summary>
 /// IViewForAttribute.
@@ -370,7 +356,7 @@ internal sealed class IViewForAttribute<T> : Attribute;
 /// <param name="viewModelType">Type of the view model.</param>
 [global::System.CodeDom.Compiler.GeneratedCode("ReactiveUI.SourceGenerators.IViewForGenerator", "1.1.0.0")]
 [AttributeUsage(AttributeTargets.Class, AllowMultiple = false, Inherited = false)]
-internal sealed class IViewForAttribute(string? viewModelType) : Attribute;
+internal sealed class IViewForAttribute(string? viewModelType) : global::System.Attribute;
 #nullable restore
 #pragma warning restore
 """;
@@ -383,8 +369,6 @@ internal sealed class IViewForAttribute(string? viewModelType) : Attribute;
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
 
-using System;
-
 // <auto-generated/>
 #pragma warning disable
 #nullable enable
@@ -400,7 +384,7 @@ namespace ReactiveUI.SourceGenerators.WinForms;
 /// <param name="viewModelType">Type of the view model.</param>
 [global::System.CodeDom.Compiler.GeneratedCode("ReactiveUI.SourceGenerators.ViewModelControlHostGenerator", "1.1.0.0")]
 [AttributeUsage(AttributeTargets.Class, AllowMultiple = false, Inherited = false)]
-internal sealed class ViewModelControlHostAttribute(string? baseType) : Attribute;
+internal sealed class ViewModelControlHostAttribute(string? baseType) : global::System.Attribute;
 #nullable restore
 #pragma warning restore
 """;
@@ -413,8 +397,6 @@ public static string GetRoutedControlHostAttribute() => $$"""
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
 
-using System;
-
 // <auto-generated/>
 #pragma warning disable
 #nullable enable
@@ -430,7 +412,7 @@ namespace ReactiveUI.SourceGenerators.WinForms;
 /// <param name="viewModelType">Type of the view model.</param>
 [global::System.CodeDom.Compiler.GeneratedCode("ReactiveUI.SourceGenerators.RoutedControlHostGenerator", "1.1.0.0")]
 [AttributeUsage(AttributeTargets.Class, AllowMultiple = false, Inherited = false)]
-internal sealed class RoutedControlHostAttribute(string? baseType) : Attribute;
+internal sealed class RoutedControlHostAttribute(string? baseType) : global::System.Attribute;
 #nullable restore
 #pragma warning restore
 """;
@@ -443,8 +425,6 @@ internal sealed class RoutedControlHostAttribute(string? baseType) : Attribute;
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
 
-using System;
-
 // <auto-generated/>
 #pragma warning disable
 #nullable enable
@@ -456,7 +436,31 @@ namespace ReactiveUI.SourceGenerators;
 /// <seealso cref="Attribute" />
 [global::System.CodeDom.Compiler.GeneratedCode("{{ReactiveGenerator.GeneratorName}}", "{{ReactiveGenerator.GeneratorVersion}}")]
 [AttributeUsage(AttributeTargets.Field, AllowMultiple = false, Inherited = false)]
-internal sealed class BindableDerivedListAttribute : Attribute;
+internal sealed class BindableDerivedListAttribute : global::System.Attribute;
+#nullable restore
+#pragma warning restore
+""";
+
+    public const string ReactiveCollectionAttributeType = "ReactiveUI.SourceGenerators.ReactiveCollectionAttribute";
+
+    public static string ReactiveCollectionAttribute => $$"""
+// Copyright (c) {{DateTime.Now.Year}} .NET Foundation and Contributors. All rights reserved.
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for full license information.
+
+// <auto-generated/>
+#pragma warning disable
+#nullable enable
+namespace ReactiveUI.SourceGenerators;
+
+/// <summary>
+/// ReactiveAttribute.
+/// </summary>
+/// <seealso cref="Attribute" />
+[global::System.CodeDom.Compiler.GeneratedCode("{{ReactiveGenerator.GeneratorName}}", "{{ReactiveGenerator.GeneratorVersion}}")]
+[AttributeUsage(AttributeTargets.Field | AttributeTargets.Property, AllowMultiple = false, Inherited = false)]
+internal sealed class ReactiveCollectionAttribute : global::System.Attribute;
 #nullable restore
 #pragma warning restore
 """;