String Builder C#

[Ashes Csharp]

I have a stringbuilder which contains a string. I need to check last three character of the string in string builder and remove the last three character if it matches the condition.

[snehasismishra1]

Find the below code:

 StringBuilder builder = new StringBuilder("DotNetQuestion");
       if (Conditin)
       {
          int len = builder.Length;
          builder.Remove(len - 3, 3);
          Console.WriteLine(builder);
          Console.ReadLine();
        }

Thanks,
Snehasis