# Vector.Equality(Vector, Vector) 演算子

## 定義

2 つのベクターを比較し、相互に等価かどうかを判断します。Compares two vectors for equality.

``````public:
static bool operator ==(System::Windows::Vector vector1, System::Windows::Vector vector2);``````
``public static bool operator == (System.Windows.Vector vector1, System.Windows.Vector vector2);``
``static member ( = ) : System.Windows.Vector * System.Windows.Vector -> bool``
``Public Shared Operator == (vector1 As Vector, vector2 As Vector) As Boolean``

vector1
Vector

vector2
Vector

#### 戻り値

`true`XY および `vector1` コンポーネントが等しい場合は `vector2`。それ以外の場合は `false``true` if the X and Y components of `vector1` and `vector2` are equal; otherwise, `false`.

## 例

``````private Boolean overloadedEqualityOperatorExample()
{
Vector vector1 = new Vector(20, 30);
Vector vector2 = new Vector(45, 70);

// If the two vectors are equal, areEqual is True,
// otherwise it is False. In this example it is False.
Boolean areEqual = (vector1 == vector2);

return areEqual;
}
``````
``````Private Function overloadedEqualityOperatorExample() As Boolean
Dim vector1 As New Vector(20, 30)
Dim vector2 As New Vector(45, 70)

' If the two vectors are equal, areEqual is True,
' otherwise it is False. In this example it is False.
Dim areEqual As Boolean = (vector1 = vector2)

Return areEqual

End Function
``````

## 注釈

ベクターの X プロパティと Y プロパティについては、Double 値を使用して説明します。A vector's X and Y properties are described using Double values. Double の値は算術演算を実行すると有効桁数が失われる可能性があるため、論理的に等しい2つの Vector 構造体の比較は失敗する可能性があります。Because the value of a Double can lose precision when arithmetic operations are performed on it, a comparison between two Vector structures that are logically equal might fail.