So Reflection

CSharp · Console

/Program.cs

using System;
using System.Linq;
using System.Reflection;

public class Program
{
	public static void Main()
	{
		Program p = new Program();
		Type[] types = Assembly.GetExecutingAssembly().GetTypes();
		Type TEnum = types.Where(d => d.Name == "TEnum").FirstOrDefault();
		var values = TEnum.GetEnumValues();
		var error = new object ();
		foreach (var value in values)
		{
			if (value.ToString() == "Test2")
			{
				error = value;
			}
		}

		var program = Assembly.GetExecutingAssembly().GetTypes().First(d => d.Name == "Program");
		foreach (var method in program.GetMethods())
		{
			if (method.Name == "TestMethod")
			{
				method.Invoke(null, new object[2]
				{
				"A", error
				}

				);
			}
		}
	}

	public static void TestMethod(string a, ref TEnum b)
	{
		Console.WriteLine("test");
	}
}

public enum TEnum
{
	Test,
	Test2
}