Reflection on Unity class

Hi,
I am working on developer tool, I would like to call method from console in runtime like this: className.methodName param_1 param_2 For now it works, but it only can found method in my class, if I try find Unity class (for instance Application.LoadLevel()) it returns null. The code is:

Type CheckInAllAssemblies(string typeName)
	{
		Assembly[] assemblies = AppDomain.CurrentDomain.GetAssemblies();
		Type type = null;
		foreach(var a in assemblies)
		{
			type = a.GetType(typeName);
			if(type != null)
				return type;
		}
		return null;
	}

I also have found that this would return null as well:

		Type type = typeof(Debug).Assembly.GetType("Debug");

It seems I forgot about namespace…