Search any characters from start in CSharp

using System; //ww  w .  ja v  a2s  .  com
 
public class StringSearchDemo { 
  public static void Main() { 
    string str = "C# has powerful string handling. java2s.com"; 
    int idx; 
 
    Console.WriteLine("str: " + str); 
 
    char[] chrs = { 'a', 'b', 'c' }; 
    idx = str.IndexOfAny(chrs); 
    Console.WriteLine("Index of first 'a', 'b', or 'c': " + idx); 
 
 
  } 
}