C#6.0语法糖剖析

public string Id { get; set; } = "001";

public class Customer 
{
 [CompilerGenerated] 
private string kBackingField = "hello world"; 
public Customer() 
{ 
this.kBackingField = "hello world"; 
}

public string Name
{
    [CompilerGenerated]
    get
    {
        return this.<Name>k__BackingField;
    }
    [CompilerGenerated]
    set
    {
        this.<Name>k__BackingField = value;
    }
}
}

public string Name { get; } = "hello world";

[CompilerGenerated] 
private readonly string kBackingField; 
public Customer() 
{
    this.kBackingField = "hello world";
} 
public string Name1 
{
    [CompilerGenerated] 
    get { return this.k__BackingField; }
}

private static void Test() => Console.WriteLine("Hello World!!");
Body Get(int x, int y) => new Body(1 + x, 2 + y);

private Program.Body Get(int x, int y)
{
    return new Program.Body(1 + x, 2 + y);
}

async void OutPut(int x, int y) => await new Task(() => Console.WriteLine("hello wolrd"));

public string Name => "Frank";

public string Name
{ 
    get { return "Frank"; }
}

using static System.Console;
private static void ListContacts(IEnumerable<Contact> contacts)
{
    foreach (var contact in contacts)
    {
        WriteLine("{0,-6}{1,-6}{2,-20}{3,-10}", contact.Id, contact.Name, contact.EmailAddress, contact.PhoneNum);
    }
    WriteLine();
}

private static void ListContacts(IEnumerable<Contact> contacts)
{
    foreach (var contact in contacts)
    {
        Console.WriteLine("{0,-6}{1,-6}{2,-20}{3,-10}", contact.Id, contact.Name, contact.EmailAddress, contact.PhoneNum);
    }
    Console.WriteLine();
}

Customer customer = new Customer();
string name = customer?.Name;

Customer customer = new Customer();
if (customer != null)
{
    string name = customer.Name;
}

if (customer?.Face()??false)

 int? contactNameLen = contact?.Name?.Length; 

var contactInfo = string.Format("Id:{0} Name:{1} EmailAddr:{2} PhoneNum:{3}", contact.Id, contact.Name, contact.EmailAddress, contact.PhoneNum);

var contactInfo2 = $"Id:{contact.Id} Name:{contact.Name} EmailAddr:{contact.EmailAddress} PhoneNum:{contact.PhoneNum}";

var contactInfo = $"Id:{contact.Id} Name:{(contact.Name.Length == 0 ? "Frank" : contact.Name)} EmailAddr:{contact.EmailAddress} PhoneNum:{contact.PhoneNum}";