Enable nullability in ExceptionConverter (#7127)

gpetrou · web-flow · commit 504caaa38ef6 · 2022-05-03T17:14:27.000+10:00
diff --git a/src/System.Windows.Forms/src/System/Windows/Forms/PropertyGridInternal/PropertyDescriptorGridEntry.ExceptionConverter.cs b/src/System.Windows.Forms/src/System/Windows/Forms/PropertyGridInternal/PropertyDescriptorGridEntry.ExceptionConverter.cs
@@ -2,8 +2,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-#nullable disable
-
 using System.ComponentModel;
 using System.Globalization;
 
@@ -16,7 +14,7 @@ internal partial class PropertyDescriptorGridEntry
         /// </summary>
         private class ExceptionConverter : TypeConverter
         {
-            public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
+            public override object? ConvertTo(ITypeDescriptorContext? context, CultureInfo? culture, object? value, Type destinationType)
             {
                 if (destinationType == typeof(string))
                 {

Original file line number	Diff line number	Diff line change
`@@ -2,8 +2,6 @@`
`2`	`2`	`// The .NET Foundation licenses this file to you under the MIT license.`
`3`	`3`	`// See the LICENSE file in the project root for more information.`
`4`	`4`
`5`		`-#nullable disable`
`6`		`-`
`7`	`5`	`using System.ComponentModel;`
`8`	`6`	`using System.Globalization;`
`9`	`7`
`@@ -16,7 +14,7 @@ internal partial class PropertyDescriptorGridEntry`
`16`	`14`	`/// </summary>`
`17`	`15`	`private class ExceptionConverter : TypeConverter`
`18`	`16`	`{`
`19`		`- public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)`
	`17`	`+ public override object? ConvertTo(ITypeDescriptorContext? context, CultureInfo? culture, object? value, Type destinationType)`
`20`	`18`	`{`
`21`	`19`	`if (destinationType == typeof(string))`
`22`	`20`	`{`