feat: add DynamicallyAccessedMembers attribute

Refit/DynamicallyAccessedMembersAttribute.cs

@@ -0,0 +1,65 @@
+#if NETSTANDARD2_0 || NET462
+namespace System.Diagnostics.CodeAnalysis;
+
+/// <summary>
+/// Indicates that certain members on a specified <see cref="Type"/> are accessed dynamically,
+/// for example through <see cref="Reflection"/>.
+/// </summary>
+/// <remarks>
+/// This allows tools to understand which members are being accessed during the execution
+/// of a program.
+///
+/// This attribute is valid on members whose type is <see cref="Type"/> or <see cref="string"/>.
+///
+/// When this attribute is applied to a location of type <see cref="string"/>, the assumption is
+/// that the string represents a fully qualified type name.
+///
+/// When this attribute is applied to a class, interface, or struct, the members specified
+/// can be accessed dynamically on <see cref="Type"/> instances returned from calling
+/// <see cref="object.GetType"/> on instances of that class, interface, or struct.
+///
+/// If the attribute is applied to a method it's treated as a special case and it implies
+/// the attribute should be applied to the "this" parameter of the method. As such the attribute
+/// should only be used on instance methods of types assignable to System.Type (or string, but no methods
+/// will use it there).
+/// </remarks>
+internal sealed class DynamicallyAccessedMembersAttribute : Attribute
+{
+    /// <summary>
+    /// Initializes a new instance of the <see cref="DynamicallyAccessedMembersAttribute"/> class
+    /// with the specified member types.
+    /// </summary>
+    /// <param name="memberTypes">The types of members dynamically accessed.</param>
+    public DynamicallyAccessedMembersAttribute(DynamicallyAccessedMemberTypes memberTypes)
+    {
+        MemberTypes = memberTypes;
+    }
+
+    /// <summary>
+    /// Gets the <see cref="DynamicallyAccessedMemberTypes"/> which specifies the type
+    /// of members dynamically accessed.
+    /// </summary>
+    public DynamicallyAccessedMemberTypes MemberTypes { get; }
+}
+
+[Flags]
+internal enum DynamicallyAccessedMemberTypes
+{
+    None = 0,
+    PublicParameterlessConstructor = 1,
+    PublicConstructors = 3,
+    NonPublicConstructors = 4,
+    PublicMethods = 8,
+    NonPublicMethods = 16, // 0x00000010
+    PublicFields = 32, // 0x00000020
+    NonPublicFields = 64, // 0x00000040
+    PublicNestedTypes = 128, // 0x00000080
+    NonPublicNestedTypes = 256, // 0x00000100
+    PublicProperties = 512, // 0x00000200
+    NonPublicProperties = 1024, // 0x00000400
+    PublicEvents = 2048, // 0x00000800
+    NonPublicEvents = 4096, // 0x00001000
+    Interfaces = 8192, // 0x00002000
+    All = -1, // 0xFFFFFFFF
+}
+#endif

Refit/RequestBuilderImplementation.cs

@@ -1,6 +1,7 @@
 using System.Collections;
 using System.Collections.Concurrent;
 using System.Diagnostics;
+using System.Diagnostics.CodeAnalysis;
 using System.Net.Http;
 using System.Reflection;
 using System.Text;
@@ -57,7 +58,7 @@ public RequestBuilderImplementation(
         }
 
         void AddInterfaceHttpMethods(
-            Type interfaceType,
+            [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicMethods)]Type interfaceType,
             Dictionary<string, List<RestMethodInfoInternal>> methods
         )
         {