How to find the MaxCapacity of a StringBuilder in C#

// C# program to demonstrate
// the MaxCapacity Property
using System;
using System.Text;

class GFG {

    // Main Method
    public static void Main(String[] args)
    {

        // Create a StringBuilder object
        // with a String passed as parameter
        StringBuilder str1 = 
         new StringBuilder("GeeksforGeeks");

        // printing the MaxCapacity of str1
        Console.WriteLine("Maximum Capacity of str1 is: " 
                                     + str1.MaxCapacity);

        // Create a StringBuilder object
        StringBuilder str2 = new StringBuilder();

        // printing the MaxCapacity of str2
        Console.WriteLine("Maximum Capacity of str2 is: " 
                                     + str2.MaxCapacity);
    }
}