using System;

using System.Globalization;

public class Demo {

   public static void Main(String[] args) {

      string str1 = "/Date(1690214400000)/"; 

      Console.WriteLine("String1 = "+str1);

      Console.WriteLine("String1 (after trim) = "+str1.Replace("/"));

      Console.WriteLine("String1 ToUpper = "+str1.ToUpper(new CultureInfo("en-US", false)));

      Console.WriteLine("String1 Substring from index4 = " + str1.Substring(2, 2));

   }

}