How to call an extension method without using

Question

using System;

class Runner
{
    static void Main()
    {
        A a = new A();
        // how to say a.PrintStuff() without a \'using\'
        Console.Read();
           


        

Answer 1

In our projects extensions are placed in the same namespace as class extension for. Your example:

A.cs:
using System;
namespace ANamespace
{

     class A { }
}

AExtensions.cs:
namespace ANamespace
{
    static class AExtensions
    {
        public static void PrintStuff(this A a)
        {
            Console.WriteLine("text");
        }
    }
}

Now when you add using for ANamespace for using the A class, all extensions for A class will be included too.