gistfile1.cs

public static bool IsSubclassOfOpenGeneric(this Type type, Type generic)
{
	while (type != typeof(object))
	{
		var current = type.IsGenericType ? type.GetGenericTypeDefinition() : type;
		if (generic == current)
		{
			return true;
		}
		type = type.BaseType;
	}
	return false;
}