Fix ReadCodeMappingInfo for delegates that are embedded in the declaring type, not a nested type.

ICSharpCode.Decompiler/CSharp/CSharpDecompiler.cs

@@ -667,6 +667,7 @@ namespace ICSharpCode.Decompiler.CSharp
 								closureTypeHandle = ExtractDeclaringType(memberRef);
 								if (!closureTypeHandle.IsNil) {
 									var closureType = module.Metadata.GetTypeDefinition(closureTypeHandle);
+									if (closureTypeHandle != declaringType) {
 										// Must be a nested type of the containing type.
 										if (closureType.GetDeclaringType() != declaringType)
 											break;
@@ -675,6 +676,14 @@ namespace ICSharpCode.Decompiler.CSharp
 										foreach (var m in closureType.GetMethods()) {
 											connectedMethods.Enqueue(m);
 										}
+									} else {
+										// Delegate body is declared in the same type
+										foreach (var m in closureType.GetMethods()) {
+											var methodDef = module.Metadata.GetMethodDefinition(m);
+											if (methodDef.Name == memberRef.Name)
+												connectedMethods.Enqueue(m);
+										}
+									}
 									break;
 								}
 								break;