C# 6.0 新特征匯總。本站提示廣大學習愛好者：（C# 6.0 新特征匯總）文章只能為提供參考，不一定能成為您想要的結果。以下是C# 6.0 新特征匯總正文
1. 靜態using(static using)
靜態using聲明許可不應用類名直接挪用靜態辦法。
The static using declaration allows invoking static methods without the class
name.
In C# 5
using System;
Console.WriteLine("Hello, World!");
In C# 6
using static System.Console;
WriteLine("Hello, World");
2. 表達式辦法(Expression-Bodied Methods)
應用表達式辦法，只要一條語句的辦法可使用lambda語法寫。
With expression-bodied methods, a method that includes just one statement can
be written with the lambda syntax.
In C# 5
public bool IsSquare(Rectangle rect)
{
return rect.Height == rect.Width;
}
In C# 6
public bool IsSquare(Rectangle rect) => rect.Height == rect.Width;
3. 表達式屬性(Expression-Bodied Properties)
跟表達式辦法相似，只要一個get拜訪器的單行屬性可使用lambda語法寫。
Similar to expression-bodied methods, one-line properties with only a get accessor
can be written with the lambda syntax
In C# 5
public string FullName
{
get
{
return FirstName +"" + LastName;
}
}
In C# 6
public string FullName => FirstName +"" + LastName;
4. 主動屬性初始化器(Auto-Implemented Property Intializers)
主動屬性可使用屬性初始化器初始化。
Auto-implemented properties can be initialized with a property initializer.
In C# 5
public class Person
{
public Person()
{
Age = 24;
}
public int Age {get; set;}
}
In C# 6
public class Person
{
public int Age {get; set;} = 42;
}
5. 只讀主動屬性(Read-Only Auto Properties)
C# 5須要完全的屬性語法完成只讀屬性，C# 6可使用主動屬性完成。
To implement read-only properties, C# 5 requires the full property syntax. With
C# 6, you can do this using auto-implemented properties.
In C# 5
private readonly int _bookId;
public BookId
{
get
{
return _bookId;
}
}
In C# 6
public BookId {get;}
6. nameof操作符(nameof Operator)
字段、屬性、辦法和類型的name可以經由過程nameof拜訪。應用nameof，可以便利的重構name變更。
With the new nameof operator, names of fields, properties, methods, or types can
be accessed. With this, name changes are not missed with refactoring.
In C# 5
public void Method(object o)
{
if (o == null) throw new ArgumentNullException("o");
In C# 6
public void Method(object o)
{
if (o == null) throw new ArgumentNullException(nameof(o));
7. Null傳遞操作符(Null Propagation Operator)
Null傳遞操作符簡化了空值檢討。
The null propagation operator simplifies null checks.
In C# 5
int? age = p == null ? null : p.Age;
var handler = Event;
if (handler != null)
{
handler(source, e);
}
In C# 6
int? age = p?.Age;
handler?.Invoke(source, e);
8. 字符串插值(String Interpolation)
字符串差值移除對string.Format的挪用，應用表達式占位符代替數字格局占位符。
The string interpolation removes calls to string.Format. Instead of using
numbered format placeholders in the string, the placeholders can include
expressions.
In C# 5
public override ToString()
{
return string.Format("{0}, {1}", Title, Publisher);
}
In C# 6
public override ToString() => $"{Title} {Publisher}";
9. 字典初始化器(Dictionary Initializers)
字典可使用相似聚集的字典初始化器初始化。
Dictionaries can now be initialized with a dictionary initializer—similar to the
collection initializer.
In C# 5
var dict = new Dictionary<int, string>();
dict.Add(3,"three");
dict.Add(7,"seven");
In C# 6
var dict = new Dictionary<int, string>()
{
[3] ="three",
[7] ="seven"
};
10. 異常過濾器(Exception Filters)
異常過濾器許可你在捕捉異常進步行過濾。
Exception filters allow you to filter exceptions before catching them.
In C# 5
try
{
//etc.
} catch (MyException ex)
{
if (ex.ErrorCode != 405) throw;
// etc.
}
In C# 6
try
{
//etc.
} catch (MyException ex) when (ex.ErrorCode == 405)
{
// etc.
}
11. 在Catch應用Await(Await in Catch)
await可以在catch塊中直接應用，C# 5中須要變通應用。
await can now be used in the catch clause. C# 5 required a workaround.
In C# 5
bool hasError = false;
string errorMessage = null;
try
{
//etc.
} catch (MyException ex)
{
hasError = true;
errorMessage = ex.Message;
}
if (hasError)
{
await new MessageDialog().ShowAsync(errorMessage);
}
In C# 6
try
{
//etc.
} catch (MyException ex)
{
await new MessageDialog().ShowAsync(ex.Message);
}
以上所述是小編給年夜家引見的C# 6.0 新特征匯總，願望對年夜家有所贊助，假如年夜家有任何疑問請給我留言，小編會實時答復年夜家的。在此也異常感激年夜家對網站的支撐！
