.NET extension method to determine if a type's superclass is of non-specific generic type.

TypeExtensions.cs

using System;

namespace Extensions
{
    public static class TypeExtensions
    {
        public static bool IsSubclassOfRawGeneric(this Type type, Type generic)
        {
            if (null == generic)
            {
                throw new ArgumentNullException("generic");
            }

            if (type.IsInterface || type.IsValueType)
            {
                return false;
            }

            while (type != typeof(object))
            {
                Type currentType = type.IsGenericType ? type.GetGenericTypeDefinition() : type;
                if (currentType != null && currentType.IsGenericType && generic.GetGenericTypeDefinition() == currentType.GetGenericTypeDefinition())
                {
                    return true;
                }
                type = type.BaseType;
            }

            return false;
        }
    }
}