Removes all occurrences of white space characters from the beginning and end of this instance.

String.Trim Method () Removes all occurrences of white space characters from the beginning and end of this instance.

[C#] 
using System;

public class TrimTest {
    public static void Main() {

        string [] temp = MakeArray();

        Console.WriteLine("Concatenating the inital values in the array, we get the string:");
        Console.WriteLine("'{0}'{1}", String.Concat(temp), Environment.NewLine);

        // trim whitespace from both ends of the elements
        for (int i = 0; i < temp.Length; i++)
            temp[i] = temp[i].Trim();

        Console.WriteLine("Concatenating the trimmed values in the array, we get the string:");
        Console.WriteLine("'{0}'{1}", String.Concat(temp), Environment.NewLine);

        // reset the array
        temp = MakeArray();

        // trim the start of the elements. Passing null trims whitespace only
        for (int i = 0; i < temp.Length; i++)
            temp[i] = temp[i].TrimStart(null);

        Console.WriteLine("Concatenating the start-trimmed values in the array, we get the string:");
        Console.WriteLine("'{0}'{1}", String.Concat(temp), Environment.NewLine);

        // reset the array
        temp = MakeArray();

        // trim the end of the elements. Passing null trims whitespace only
        for (int i = 0; i < temp.Length; i++)
            temp[i] = temp[i].TrimEnd(null);

        Console.WriteLine("Concatenating the end-trimmed values in the array, we get the string:");
        Console.WriteLine("'{0}'", String.Concat(temp));
    }

    private static string [] MakeArray() {
        string [] arr = {"  please    ", "  tell    ", "  me    ", "  about    ", "  yourself    "};
        return arr;
    }
}