Skip to content

Commit ab1aada

Browse files
Copilotgewarren
Copilot
and
gewarren
committed
Add breaking change documentation for DAMT.All replacement in reflection APIs
Co-authored-by: gewarren <[email protected]>
1 parent 42fb275 commit ab1aada

File tree

6 files changed

+235
-0
lines changed

6 files changed

+235
-0
lines changed

‎docs/core/compatibility/reflection/10.0/ireflect-damt-annotations.md‎

Lines changed: 51 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,51 @@
1+
---
2+
title: "Breaking change: Replace DAMT.All with more restricted annotation on InvokeMember/FindMembers/DeclaredMembers"
3+
description: "Learn about the breaking change in .NET 10 where System.Reflection APIs InvokeMember, FindMembers, and DeclaredMembers use more restricted annotations instead of DAMT.All."
4+
ms.date: 01/10/2025
5+
ai-usage: ai-generated
6+
---
7+
8+
# Replace DAMT.All with more restricted annotation on InvokeMember/FindMembers/DeclaredMembers
9+
10+
Starting in .NET 10, the <xref:System.Reflection> APIs <xref:System.Reflection.IReflect.InvokeMember%2A>, <xref:System.Reflection.IReflect.GetMembers%2A>, and <xref:System.Reflection.TypeInfo.DeclaredMembers?displayProperty=nameWithType> have been updated to use more restricted annotations instead of <xref:System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.All?displayProperty=nameWithType>. This change affects scenarios where developers implement the <xref:System.Reflection.IReflect> interface or derive from <xref:System.Reflection.TypeInfo>. The previous use of `DAMT.All` was overly permissive and could lead to unintended behavior, such as capturing interface methods implemented by a class or generating warnings due to unsafe reflection calls.
11+
12+
## Version introduced
13+
14+
.NET 10 Preview 1
15+
16+
## Previous behavior
17+
18+
The <xref:System.Reflection.IReflect.InvokeMember%2A>, <xref:System.Reflection.IReflect.GetMembers%2A>, and <xref:System.Reflection.TypeInfo.DeclaredMembers?displayProperty=nameWithType> APIs used the <xref:System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.All?displayProperty=nameWithType> annotation, which was overly permissive. This could result in capturing additional members, such as interface methods implemented by a class, and potentially cause runtime warnings or unsafe reflection calls.
19+
20+
## New behavior
21+
22+
The <xref:System.Reflection.IReflect.InvokeMember%2A>, <xref:System.Reflection.IReflect.GetMembers%2A>, and <xref:System.Reflection.TypeInfo.DeclaredMembers?displayProperty=nameWithType> APIs now use more restricted annotations, which provide better control over the members captured during reflection. Developers implementing <xref:System.Reflection.IReflect> or deriving from <xref:System.Reflection.TypeInfo> must update their annotations to match the new behavior.
23+
24+
The following code snippet shows an example of the required annotation for implementing <xref:System.Reflection.IReflect.InvokeMember%2A>:
25+
26+
:::code language="csharp" source="./snippets/ireflect-damt-annotations/csharp/MyType.cs" id="snippet_InvokeMember":::
27+
28+
:::code language="vb" source="./snippets/ireflect-damt-annotations/vb/MyType.vb" id="snippet_InvokeMember":::
29+
30+
## Type of breaking change
31+
32+
This change is a [behavioral change](../../categories.md#behavioral-change) and can affect [source compatibility](../../categories.md#source-compatibility).
33+
34+
## Reason for change
35+
36+
The change was introduced to improve the accuracy of annotations in <xref:System.Reflection> APIs and to address issues caused by the overly permissive <xref:System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.All?displayProperty=nameWithType> annotation. This ensures better compatibility with trimming and reflection scenarios, reduces runtime warnings, and prevents unsafe reflection calls.
37+
38+
## Recommended action
39+
40+
Developers who implement <xref:System.Reflection.IReflect> or derive from <xref:System.Reflection.TypeInfo> should review their code and update annotations to align with the new behavior. Specifically:
41+
42+
1. Replace <xref:System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.All?displayProperty=nameWithType> annotations with more restricted annotations, such as <xref:System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicMethods?displayProperty=nameWithType>, <xref:System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.NonPublicMethods?displayProperty=nameWithType>, or other appropriate types.
43+
2. Test reflection scenarios to ensure that the updated annotations capture the intended members and don't introduce runtime errors or warnings.
44+
45+
For more information on `DynamicallyAccessedMembers` annotations and their usage, refer to [Prepare .NET libraries for trimming](/dotnet/core/deploying/trimming/prepare-libraries-for-trimming).
46+
47+
## Affected APIs
48+
49+
- <xref:System.Reflection.IReflect.InvokeMember(System.String,System.Reflection.BindingFlags,System.Reflection.Binder,System.Object,System.Object[],System.Reflection.ParameterModifier[],System.Globalization.CultureInfo,System.String[])?displayProperty=fullName>
50+
- <xref:System.Reflection.IReflect.GetMembers(System.Reflection.BindingFlags)?displayProperty=fullName>
51+
- <xref:System.Reflection.TypeInfo.DeclaredMembers?displayProperty=fullName>

‎docs/core/compatibility/reflection/10.0/snippets/ireflect-damt-annotations/csharp/MyType.cs‎

Lines changed: 86 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,86 @@
1+
using System;
2+
using System.Diagnostics.CodeAnalysis;
3+
using System.Globalization;
4+
using System.Reflection;
5+
6+
// <snippet_InvokeMember>
7+
class MyType : IReflect
8+
{
9+
[DynamicallyAccessedMembers(
10+
DynamicallyAccessedMemberTypes.PublicFields |
11+
DynamicallyAccessedMemberTypes.NonPublicFields |
12+
DynamicallyAccessedMemberTypes.PublicMethods |
13+
DynamicallyAccessedMemberTypes.NonPublicMethods |
14+
DynamicallyAccessedMemberTypes.PublicProperties |
15+
DynamicallyAccessedMemberTypes.NonPublicProperties |
16+
DynamicallyAccessedMemberTypes.PublicConstructors |
17+
DynamicallyAccessedMemberTypes.NonPublicConstructors)]
18+
public object InvokeMember(
19+
string name,
20+
BindingFlags invokeAttr,
21+
Binder? binder,
22+
object? target,
23+
object?[]? args,
24+
ParameterModifier[]? modifiers,
25+
CultureInfo? culture,
26+
string[]? namedParameters)
27+
{
28+
throw new NotImplementedException();
29+
}
30+
31+
public FieldInfo? GetField(string name, BindingFlags bindingAttr)
32+
{
33+
throw new NotImplementedException();
34+
}
35+
36+
public FieldInfo[] GetFields(BindingFlags bindingAttr)
37+
{
38+
throw new NotImplementedException();
39+
}
40+
41+
public MemberInfo[] GetMember(string name, BindingFlags bindingAttr)
42+
{
43+
throw new NotImplementedException();
44+
}
45+
46+
public MemberInfo[] GetMembers(BindingFlags bindingAttr)
47+
{
48+
throw new NotImplementedException();
49+
}
50+
51+
public MethodInfo? GetMethod(string name, BindingFlags bindingAttr)
52+
{
53+
throw new NotImplementedException();
54+
}
55+
56+
public MethodInfo? GetMethod(string name, BindingFlags bindingAttr, Binder? binder, Type[] types, ParameterModifier[]? modifiers)
57+
{
58+
throw new NotImplementedException();
59+
}
60+
61+
public MethodInfo[] GetMethods(BindingFlags bindingAttr)
62+
{
63+
throw new NotImplementedException();
64+
}
65+
66+
public PropertyInfo[] GetProperties(BindingFlags bindingAttr)
67+
{
68+
throw new NotImplementedException();
69+
}
70+
71+
public PropertyInfo? GetProperty(string name, BindingFlags bindingAttr)
72+
{
73+
throw new NotImplementedException();
74+
}
75+
76+
public PropertyInfo? GetProperty(string name, BindingFlags bindingAttr, Binder? binder, Type? returnType, Type[] types, ParameterModifier[]? modifiers)
77+
{
78+
throw new NotImplementedException();
79+
}
80+
81+
public Type UnderlyingSystemType
82+
{
83+
get { throw new NotImplementedException(); }
84+
}
85+
}
86+
// </snippet_InvokeMember>

‎docs/core/compatibility/reflection/10.0/snippets/ireflect-damt-annotations/csharp/ireflect-damt-annotations-csharp.csproj‎

Lines changed: 9 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,9 @@
1+
<Project Sdk="Microsoft.NET.Sdk">
2+
3+
<PropertyGroup>
4+
<OutputType>Library</OutputType>
5+
<TargetFramework>net10.0</TargetFramework>
6+
<Nullable>enable</Nullable>
7+
</PropertyGroup>
8+
9+
</Project>

‎docs/core/compatibility/reflection/10.0/snippets/ireflect-damt-annotations/vb/MyType.vb‎

Lines changed: 77 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,77 @@
1+
Imports System
2+
Imports System.Diagnostics.CodeAnalysis
3+
Imports System.Globalization
4+
Imports System.Reflection
5+
6+
' <snippet_InvokeMember>
7+
Class MyType
8+
Implements IReflect
9+
10+
<DynamicallyAccessedMembers(
11+
DynamicallyAccessedMemberTypes.PublicFields Or
12+
DynamicallyAccessedMemberTypes.NonPublicFields Or
13+
DynamicallyAccessedMemberTypes.PublicMethods Or
14+
DynamicallyAccessedMemberTypes.NonPublicMethods Or
15+
DynamicallyAccessedMemberTypes.PublicProperties Or
16+
DynamicallyAccessedMemberTypes.NonPublicProperties Or
17+
DynamicallyAccessedMemberTypes.PublicConstructors Or
18+
DynamicallyAccessedMemberTypes.NonPublicConstructors)>
19+
Public Function InvokeMember(
20+
name As String,
21+
invokeAttr As BindingFlags,
22+
binder As Binder,
23+
target As Object,
24+
args As Object(),
25+
modifiers As ParameterModifier(),
26+
culture As CultureInfo,
27+
namedParameters As String()) As Object Implements IReflect.InvokeMember
28+
Throw New NotImplementedException()
29+
End Function
30+
31+
Public Function GetField(name As String, bindingAttr As BindingFlags) As FieldInfo Implements IReflect.GetField
32+
Throw New NotImplementedException()
33+
End Function
34+
35+
Public Function GetFields(bindingAttr As BindingFlags) As FieldInfo() Implements IReflect.GetFields
36+
Throw New NotImplementedException()
37+
End Function
38+
39+
Public Function GetMember(name As String, bindingAttr As BindingFlags) As MemberInfo() Implements IReflect.GetMember
40+
Throw New NotImplementedException()
41+
End Function
42+
43+
Public Function GetMembers(bindingAttr As BindingFlags) As MemberInfo() Implements IReflect.GetMembers
44+
Throw New NotImplementedException()
45+
End Function
46+
47+
Public Function GetMethod(name As String, bindingAttr As BindingFlags) As MethodInfo Implements IReflect.GetMethod
48+
Throw New NotImplementedException()
49+
End Function
50+
51+
Public Function GetMethod(name As String, bindingAttr As BindingFlags, binder As Binder, types As Type(), modifiers As ParameterModifier()) As MethodInfo Implements IReflect.GetMethod
52+
Throw New NotImplementedException()
53+
End Function
54+
55+
Public Function GetMethods(bindingAttr As BindingFlags) As MethodInfo() Implements IReflect.GetMethods
56+
Throw New NotImplementedException()
57+
End Function
58+
59+
Public Function GetProperties(bindingAttr As BindingFlags) As PropertyInfo() Implements IReflect.GetProperties
60+
Throw New NotImplementedException()
61+
End Function
62+
63+
Public Function GetProperty(name As String, bindingAttr As BindingFlags) As PropertyInfo Implements IReflect.GetProperty
64+
Throw New NotImplementedException()
65+
End Function
66+
67+
Public Function GetProperty(name As String, bindingAttr As BindingFlags, binder As Binder, returnType As Type, types As Type(), modifiers As ParameterModifier()) As PropertyInfo Implements IReflect.GetProperty
68+
Throw New NotImplementedException()
69+
End Function
70+
71+
Public ReadOnly Property UnderlyingSystemType As Type Implements IReflect.UnderlyingSystemType
72+
Get
73+
Throw New NotImplementedException()
74+
End Get
75+
End Property
76+
End Class
77+
' </snippet_InvokeMember>

‎docs/core/compatibility/reflection/10.0/snippets/ireflect-damt-annotations/vb/ireflect-damt-annotations-vb.vbproj‎

Lines changed: 8 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,8 @@
1+
<Project Sdk="Microsoft.NET.Sdk">
2+
3+
<PropertyGroup>
4+
<OutputType>Library</OutputType>
5+
<TargetFramework>net10.0</TargetFramework>
6+
</PropertyGroup>
7+
8+
</Project>

‎docs/core/compatibility/toc.yml‎

Lines changed: 4 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -110,6 +110,10 @@ items:
110110
href: networking/10.0/default-http-streaming.md
111111
- name: "'Uri' length limits removed"
112112
href: networking/10.0/uri-length-limits-removed.md
113+
- name: Reflection
114+
items:
115+
- name: Replace DAMT.All with more restricted annotation on InvokeMember/FindMembers/DeclaredMembers
116+
href: reflection/10.0/ireflect-damt-annotations.md
113117
- name: SDK and MSBuild
114118
items:
115119
- name: .NET CLI `--interactive` defaults to `true` in user scenarios

0 commit comments

Comments
 (0)