Extension method for c#

Extension.cs

public  static class Extention
{
    public static bool IsAbstrct(this Type type)
    {
        return type.IsAbstract;
    }

    public static bool IsEnumerableType(this Type t)
    {
        return typeof(IEnumerable<string>).IsAssignableFrom(t);
    }
}

class Program
{
    static void Main(string[] args)
    {
        Console.WriteLine(typeof (string).IsAbstrct());
        Console.WriteLine(typeof(string).IsEnumerableType());
        Console.WriteLine(typeof(List<string>).IsAbstrct());
        Console.WriteLine(typeof(List<string>).IsEnumerableType());
    }
}