C# 6.0 Features Series

• How to try C# 6.0 and Rosyln?
• Getter-only (Read Only) Auto Properties in C# 6.0
• Lambda and Getter Only Auto-Properties in C# 6.0
• Initializers for Read-Only Auto Properties in C# 6.0
• Initializers via Expression Auto Properties in C# 6.0
• C# 6.0 – A field initializer cannot reference the non-static field, method, or property
• Lambda Expression for Function Members in C# 6.0
• Dictionary Initializers (Index Initializers) in C# 6.0
• Expression Bodies on Methods returning void in C# 6.0
• using keyword for static class in C# 6.0
• Unused namespaces in Different Color in Visual Studio 2015
• Null-Conditional Operator in C# 6.0
• Null-Conditional Operator and Delegates
• nameof Operator in C# 6.0
• Contextual Keywords in C#
• String Interpolation in C# 6.0
• Exception Filters in C# 6.0
• Await in Catch and finally block in C# 6.0

In the earlier versions of C# , using keyword was used primarily for the namespaces to be included in the C# page. There were other usages of using keyword like using block , namespace alias etc.

The C# 6.0 lets the developers use the using directive for the static class similar to the one the developers use for namespace.

using keyword for static class in C# 6.0

This feature lets the developers to invoke the static methods of the class without specifying the class name.

Assume that you have a class called Console which has a static method called WriteLine . In C# 5.0 and earlier version , you would end up specifying Console.WriteLine(“developerpublish.com C# tutorials”); as show below.

using System;
using System.Collections.Generic;
using System.Linq;

namespace MobileOSGeekApp
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("developerpublish.com C# tutorials");

            Console.ReadLine();
        }
    }
}

In C# 6.0 , you can simply include the class name with the using class Eg : using System.Console; and when using the method , invoke it without the class name as shown below.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Console;
namespace MobileOSGeekApp
{
    class Program
    {
        static void Main(string[] args)
        {
            WriteLine("developerpublish.com C# tutorials");

            ReadLine();
        }
    }
}