// C# Extension Method

// Doc: https://csharp-extension.com/en/method/1002615/stringbuilder-appendif

​

// @nuget: Z.ExtensionMethods

​

using System;

using System.Text;

public class Program

{

    public static void Main()

    {

        var test = new StringBuilder();

​

        // C# Extension Method: StringBuilder - AppendIf

        test.AppendIf(x => x.Contains("F"), "Fizz", "Buzz", "Fuzz");

​

        Console.WriteLine(test.ToString());

    }

}