using System;

using System.Text;

public class Program

{

    public static void Main()

    {

        Program obj = new Program();

        Console.WriteLine("Please Enter The String");

        string checkduplicate = "aba";

        Boolean resultduplicate = obj.Duplicate(checkduplicate);

        Console.WriteLine(resultduplicate);

    }

    public Boolean Duplicate(string enterstring)

    {

      Boolean Duplicatestring =true;

      StringBuilder bar = new StringBuilder();

      char[] arra = enterstring.ToCharArray(0,enterstring.Length);

      Console.WriteLine(arra);

      foreach( char i in arra)

      {

        if(arra.BinarySearch(dinosaurs, "Coelophysis") ==true)

        {}

          else

          {}

       bar =bar.Append(i);

      }

      Console.WriteLine(bar);

      return Duplicatestring;

    }

}

​