TypeFilter interfaceFilter = new TypeFilter(FindInterfacesFilter);

foreach (Type iinterface in _Type.FindInterfaces(interfaceFilter,null))
{
//Do something with the non-flattened hierarchical list
}


public bool FindInterfacesFilter(Type type,objectfilterObject)
{
foreach(Type iinterface in _Type.BaseType.GetInterfaces())
{
if (iinterface.Name == type.Name)
return false;
}
return true;
}