using System;

using System.Text;

public class Program

{

    public static void Main()

    {

        StringBuilder sb = new StringBuilder(); 

        sb.Append("Hello");

        // The capacity of current object is 16 and length is 5 characters. Let’s set the capacity less than the current length of the StringBuilder.

        sb.Capacity = 2; // throw exception

​

​

    }

}