# Guid.Empty Pole

## Definicja

Wystąpienie tylko do odczytu Guid struktury, którego wartość jest równa zero.A read-only instance of the Guid structure whose value is all zeros.

``public: static initonly Guid Empty;``
``public static readonly Guid Empty;``
`` staticval mutable Empty : Guid``
``Public Shared ReadOnly Empty As Guid ``

Guid

## Uwagi

Można porównać identyfikator GUID z wartością Guid.Empty pola, aby określić, czy identyfikator GUID jest różny od zera.You can compare a GUID with the value of the Guid.Empty field to determine whether a GUID is non-zero. Poniższy przykład używa operatora, Equality Aby porównać dwie wartości identyfikatora GUID z Guid.Empty , aby określić, czy składają się wyłącznie z zer.The following example uses the Equality operator to compare two GUID values with Guid.Empty to determine whether they consist exclusively of zeros.

``````// Create a GUID and determine whether it consists of all zeros.
Guid guid1 = Guid.NewGuid();
Console.WriteLine(guid1);
Console.WriteLine(\$"Empty: {guid1 == Guid.Empty}\n");

// Create a GUID with all zeros and compare it to Empty.
var bytes = new Byte[16];
var guid2 = new Guid(bytes);
Console.WriteLine(guid2);
Console.WriteLine(\$"Empty: {guid2 == Guid.Empty}");

// The example displays output like the following:
//       11c43ee8-b9d3-4e51-b73f-bd9dda66e29c
//       Empty: False
//
//       00000000-0000-0000-0000-000000000000
//       Empty: True
``````
``````Module Example
Public Sub Main()
' Create a GUID and determine whether it consists of all zeros.
Dim guid1 As Guid = Guid.NewGuid
Console.WriteLine(guid1)
Console.WriteLine("Empty: {0}", guid1 = Guid.Empty)
Console.WriteLine()

' Create a GUID with all zeros and compare it to Empty.
Dim bytes(15) As Byte
Dim guid2 As New Guid(bytes)
Console.WriteLine(guid2)
Console.WriteLine("Empty: {0}", guid2 = Guid.Empty)
End Sub
End Module
' The example displays output like the following:
'       11c43ee8-b9d3-4e51-b73f-bd9dda66e29c
'       Empty: False
'
'       00000000-0000-0000-0000-000000000000
'       Empty: True
``````