C# 6.0 New Feature

C# 6.0 New Feature

How to get C# Updated Version?

      Two ways we can update C# 6.0

      Updated Visual Studio into VS 2014

      Or
        Installing Roslyn Package in VS 2013

$ Sign :

Its simplify String indexing

Example:

var value = new Dictionary()  {            // using inside the initialize                 $first = "Nikhil"             }

Assign value to member

C# 5.0	C# 6.0
Value[first] =”Nikhile”	Value. $first = “Nikhil”

Exception Filters:

Exception filter already support in Vb.net now C#.net as well start to support .Exception filter is nothing but in catch block we can specify If Condition.

IF condition is fail inside catch block statement it won’t execute.

C# 5.0	C# 6.0
try             {       }             catch (Exception ex)             {       }	Try  {      throw new Exception("Null Error");           } catch (Exception ex) if (ex.Message == " IndexError")             {                 // this one will not execute.             }             catch (Exception ex) if (ex.Message == " Null Error ")             {              // this one will execute             }

await in Catch block and finally block :

Previous version C# not support await keyword in catch block and finally block ,Now in c# 6.0 start supporting

C# 5.0	C# 6.0
try             {                 DoSomething();             }             catch (Exception)             {              //Its not Support here                 await LogService.LogAsync(ex);             }	try             {                 DoSomething();             }             catch (Exception)             {                // New feature it will support                 await LogService.LogAsync(ex);             }

Declaration Expression:

This feature allows you to declare local variable in the middle of an expression. It is as simple as that but really destroys a pain.

C# 5.0	C# 6.0
Int  Qty; Int.TryParse(txtnumber.Text, out Qty)	Int.TryParse(txtnumber.Text, Int out Qty)

Auto Property Initialize:

In C# 6.0 added new feature called auto property initialize like below

public class Person     {         // You can use this feature on both         //getter only and setter / getter only properties         public string FirstName { get; set; } = "Nikhil";         public string LastName { get; } = "Jagathesh";     }

Primary constructors:

A primary constructor allows us to define a constructor for a type and capture the constructor parameters to use in initialization expressions throughout the rest of the type definition.  Here’s one simple example:

//this is primary constructor public Class Money(string currency, decimal amount) {     public string Currency { get; } = currency;     public decimal Amount { get; } = amount; }

Dictionary Initialize:

C# 5.0	C# 6.0
Dictionary country = new Dictionary()             {                 { "India", "TN" },                 { "United States", "Washington" },                 { "Some Country", "Some Capital " }             };	Dictionary country = new Dictionary()             {                 // Look at this!                 ["Afghanistan"] = "Kabul",                 ["Iran"] = "Tehran",                 ["India"] = "Delhi"             };

Null-Conditional Operator

 This is an exception that almost always indicates a bug because the developer didn’t perform sufficient null checking before invoking a member on a (null) object.

Look below new feature very interesting

C# 5.0	C# 6.0
public static string Truncate(string value, int length) {   string result = value; //this pain work for us   if (value != null) // Skip empty string check for elucidation   {     result = value.Substring(0, Math.Min(value.Length, length));   }   return result; }	public static string Truncate(string value, int length) {            return value?.Substring(0, Math.Min(value.Length, length)); }