using System;

public class Program

{

    public static void Main()

    {

        string[] nameArray = new string[] { "csc.etslan.org", "etsvcln1000", "cscint1234", "etsvcln0432.etslan.org"};

        string name;

        for(int i = 0; i < nameArray.Length; i++) {

            name = nameArray[i];

            Console.WriteLine("Before name = " + name);

            name = name.Substring(0, name.IndexOf(".") < 0 ? name.Length : name.IndexOf(".") );

            Console.WriteLine("After name = " + name);

            //if (name.Contains(".")) {

            //  Console.WriteLine("name was: " + name);

                //int sepPos = name.IndexOf('.');

                //string newName = name.Substring(0, name.IndexOf('.'));

            //  name = name.Substring(0, name.IndexOf('.'));

            //  Console.WriteLine("name is: " + name);

            //}

            //else {

            //  Console.WriteLine("name does not contain a separator: " + name);

            //}

            Console.WriteLine();

        } // end for

​

​

​

    }

}