C# 6.0 - Features

Auto Properties

Existing Method

public class Employee
{
public string CompanyName{get;set;}
public string Location{get;}//readonly
public string Email{get;set;}
public int ConatctNo{get;set;}
}

Can't able set the Default Value.

New Method

public class Employee
{
public string CompanyName{get;set;} = "Company Name";
public string Location{get;}="Location";//readonly
public string Email{get;set;}="email@domail.com";
public int ConatctNo{get;set;}=123456789;
}

---

Static Classes

Existing Method

using System.Math;
public class calculation
{
public int SquareNumber(int x)
{
 return Math.Sqrt(x);
}
}

New Method

using System.Math;
public class calculation
{
public int SquareNumber(int x)
{
 return Sqrt(x); //No need to use Static Class Name.
}
}

---

String Formatting

Existing Method

return String.Format("{1} {0}.",FirstName,LastName);

New Method

return "\{LastName} \{FirstName}.";

Also Use Lambda Expression

()=>{return "\{LastName} \{FirstName}.";}
or
()=>"\{LastName} \{FirstName}.";

---

Index initalizers

Existing Method

public JObject returnJSON()
{
var objJSON=new JObject();
objJSON["key1"]="value 1";
objJSON["key2"]="value 2";
return objJSON;
}

New Method

public JObject returnJSON()
{
return new JObject() { ["key1"]="value 1", ["key2"]="value 2" }
}

or

In Lambda Express

public JObject returnJSON() => new JObject() { ["key1"]="value 1", ["key2"]="value 2" };

---

Index initalizers for Dictionary

Existing Method

Dictionary dictionary = new Dictionary();
dictionary.Add("key2", 2);
dictionary.Add("key1", 1);
dictionary.Add("key0", 0);
dictionary.Add("keyN1", -1);

int value = dictionary["key2"];

New Method

Dictionary dictionary = new Dictionary()
{
["key2"]=2),
["key1"]=1),
["key0"]=0),
["keyN1"]=-1)
}

or

Dictionary dictionary = new Dictionary()
{
$key2=2,
$key1=1,
$key0=0,
$keyN1=-1
}

int value = dictionary.$key

---

Null Conditional Operators

Existing Method

public string getStringValueJSON(json,key)
{
if(json != null && json[key] != null && json[key].Type == JTokenType.String)
{
return json[key].ToString();
}
return null;
}

New Method

public string getStringValueJSON(json,key)
{
if(json?.[key]?.Type == JTokenType.String)
{
return json[key].ToString();
}
return null;
}

---

Null Conditional Operators For Delegate Object

Existing Method

{
var onChange=OnChange();
if(onChange != null)
        onChange(this,args);
}

New Method

{
OnChange?.Invoke(this,args);
}

---

"nameof" operator

Existing Method

if(objData==null)
  throw new ArgumentNullException("objData");

New Method

if(objData==null)
  throw new ArgumentNullException(nameof(objData));

---

Exception filters

Existing Method

try
{
....
}catch(ConfigureException e)
{
...
}

New Method

try
{
....
}catch(ConfigureException e) if(e.IsServer)
{
...
}

---

Await in catch and finally block

Existing Method

 we can't use await inside the catch and finally block

New Method

try
{
....
}
catch(Exception ex)
{
await logException(ex);
}
finally
{
await closeConnection();
}





Happy Code...