c#: getter/setter

Question

Those are Auto-Implemented Properties (Auto Properties for short).

The compiler will auto-generate the equivalent of the following simple implementation:

private string _type;

public string Type
{
    get { return _type; }
    set { _type = value; }
}

That is an auto-property and it is the shorthand notation for this:

private string type;
public string Type
{
  get { return this.type; }
  set { this.type = value; }
}

In C# 6:

It is now possible to declare the auto-properties just as a field:

public string FirstName { get; set; } = "Ropert";

Read-Only Auto-Properties

public string FirstName { get;} = "Ropert";

public string Type { get; set; } 

is no different than doing

private string _Type;

public string Type
{    
  get { return _Type; }
  set { _Type = value; }
}

This means that the compiler defines a backing field at runtime. This is the syntax for auto-implemented properties.

More Information: Auto-Implemented Properties

It's an automatically backed property, basically equivalent to:

private string type;
public string Type
{
   get{ return type; }
   set{ type = value; }
}

These are called auto properties.

http://msdn.microsoft.com/en-us/library/bb384054.aspx

Functionally (and in terms of the compiled IL), they are the same as properties with backing fields.