// C# Extension Method

// Doc: https://csharp-extension.com/en/method/1002084/string-nullifempty

​

// @nuget: Z.ExtensionMethods

​

using System;

​

public class Program

{

    public static void Main()

    {

        string [] values = {"EntityFramework", "", "SQL", "Java"};

​

        foreach(var str in values)

        {

            // C# Extension Method: String - NullIfEmpty

            string newStr = str.NullIfEmpty();

            Console.WriteLine(newStr);

        }

    }

}