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c#vb.netsystem.reflectionyield-return

Reflection and autogenerated types

I have a class with a single method that uses a "yield" return statement. A nested type is automatically created. Using reflection with binding flags set to BindingFlags.DeclaredOnly, I get this output:

// Public members from my class.
Test.FileSystemObject..ctor
Test.FileSystemObject.GetFiles(DirectoryInfo directory)
Test.FileSystemObject.GetFiles(String path) 

// Auto generated nested class.  
Test.FileSystemObject+<GetFiles>d__4..ctor  
Test.FileSystemObject+<GetFiles>d__4.<>3__directory  
Test.FileSystemObject+<GetFiles>d__4.<>4__this  
Test.FileSystemObject+<GetFiles>d__4.<directories>5__7  
Test.FileSystemObject+<GetFiles>d__4.<files>5__8  
Test.FileSystemObject+<GetFiles>d__4.<FSO>5__6  
Test.FileSystemObject+<GetFiles>d__4.<i>5__9  
Test.FileSystemObject+<GetFiles>d__4.<unprocessed>5__5  
Test.FileSystemObject+<GetFiles>d__4.directory

How can I determine whether a type returned by assembly.GetTypes(BindingsFlags) is such an auto generated type? I'm looking for a simple way to exclude these.

Solution

  • You can test if the type has the [CompilerGenerated] attribute:

    if (type.GetCustomAttribute(typeof(CompilerGeneratedAttribute), true) != null)
{
    ...
}

    Alternatively, you can check if the name contains characters that wouldn't be valid in user code.