Find index of number from a string in C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace IndexOfAny
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("University of California, 1980-85".IndexOfAny("0123456789".ToCharArray()));
        }
    }
}