There's no concept of forward declarations in C#, so it's allowed to use enum types before they're defined but when I try to import this C# code,
umbrello crashes.

namespace TestNamespace
{
    public class TestClass
    {
        void Dispatch(COMMAND com);
    }

    public enum COMMAND
    {
        OPTION1,
        OPTION2,
        OPTION3
    }
}

If I rearange the code like this, it works fine

namespace TestNamespace
{
    public enum COMMAND
    {
        OPTION1,
        OPTION2,
        OPTION3
    }

    public class TestClass
    {
        void Dispatch(COMMAND com);
    }
}