C# 6 Modified & Removed Features

Using static classes as directive

Earlier Releases

using System.Console;
using System.Convert;

• In the previous release we do not need to use the “static” keyword for using static classes as directive.
• In previous version we can only use static classes and namespaces in as directive.

Current Release (VS 2015)

using static System.Console;
using static System.Convert;

1. Now we need add static keyword to use static classes as directive.
2. In previous release apart from namespace we can use static classes. But in current release (VS 2015) using static keyword we can include static classes & non static classes, too.
   
   For code snippet of Static Classes as directive visit here & for Non-Static classes as directive visit here.

Primary Constructors

Earlier Releases

namespace PrimaryConstructorDemo
{
class PrimaryConstructorDemo(int employeeId, string empName, string empDesignation)
{
public int EmployeeId { get; } = employeeId;
public string EmployeeName { get; } = empName;
public string EmployeeDesignation { get;} = empDesignation;
}
}

Current Release (VS 2015) 

• This feature has been removed.
  
  
  

Declaration expressions in C#

• Removed in Visual Studio 2015 Latest Releases.

Out parameters in VB

• Removed in Visual Studio 2015 Latest Releases.