# Guid.Equality(Guid, Guid) 演算子

## 定義

2 つの指定された Guid オブジェクトの値が等しいかどうかを示します。

``````public:
static bool operator ==(Guid a, Guid b);``````
``public static bool operator == (Guid a, Guid b);``
``static member ( = ) : Guid * Guid -> bool``
``Public Shared Operator == (a As Guid, b As Guid) As Boolean``

a
Guid

b
Guid

#### 戻り値

`a``b` が等しい場合は `true`。それ以外の場合は `false`

## 例

``````// 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
``````
``````open System

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

// Create a GUID with all zeros and compare it to Empty.
let bytes = Array.zeroCreate<byte> 16
let guid2 = Guid bytes
printfn \$"{guid2}"
printfn \$"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
``````

## 注釈

この演算子の同等のメソッドは 次のようになります。 Guid.Equals(Object)