class StringBuilderTest
{
    static void Main()
    {
        string text = null;
 
        // Use StringBuilder for concatenation in tight loops.
        System.Text.StringBuilder sb = new System.Text.StringBuilder();
        for (int i = 0; i < 100; i++)
        {
            sb.AppendLine(i.ToString());
        }
        System.Console.WriteLine(sb.ToString());
 
        // Keep the console window open in debug mode.
        System.Console.WriteLine("Press any key to exit.");
        System.Console.ReadKey();
    }
}
 

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