Iterate over types in an assembly, looking for types to tamper with.

NotificationTamperer.cs

public class NotificationTamperer : ITamperer
{
  private readonly string _assemblyOutputFileName;

  public NotificationTamperer() : this("default_tampered.dll") {}

  public NotificationTamperer(string assemblyOutputFileName)
  {
    _assemblyOutputFileName = assemblyOutputFileName;
  }

  private static AssemblyDefinition ReadSilverlightAssembly(
    string assemblyPath)
  {
    var resolver = new DefaultAssemblyResolver();
    resolver.AddSearchDirectory(@"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\Silverlight\v4.0");

    var assembly = AssemblyDefinition.ReadAssembly(
      assemblyPath,
      new ReaderParameters { AssemblyResolver = resolver });
    return assembly;
  }

  public bool TamperWith(string assemblyPath)
  {
    var assembly = ReadSilverlightAssembly(assemblyPath);
    bool result = TamperWith(assembly);
    if (result)
    {
      assembly.Write(_assemblyOutputFileName);
    }
    return result;
  }

  private bool TamperWith(AssemblyDefinition assembly)
  {
    bool result = false;
    foreach (TypeDefinition type in assembly.MainModule.Types)
    {
      result = new TypeTamperer(type).MaybeTamperWith() || result;
    }
    return result;
  }
}