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Rect.Equality Operator

Compares two rectangles for exact equality.

Namespace:  System.Windows
Assembly:  WindowsBase (in WindowsBase.dll)

public static bool operator ==(
	Rect rect1,
	Rect rect2
)

Parameters

rect1
Type: System.Windows.Rect

The first rectangle to compare.

rect2
Type: System.Windows.Rect

The second rectangle to compare.

Return Value

Type: System.Boolean
true if the rectangles have the same Location and Size values; otherwise, false.

This operation tests for object equality.

In this comparison, two instances of Double.NaN are considered equal.

NoteNote

A rectangle's position and dimensions are described by Double values. Because Double values can lose precision when operated upon, a comparison between two values that are logically equal might fail.

The following example shows how to use the Equality operator to determine if two rectangles are exactly equal.

private Boolean overloadedEqualityOperatorExample()
{
    // Initialize new rectangle.
    Rect myRectangle = new Rect();

    // The Location property specifies the coordinates of the upper left-hand  
    // corner of the rectangle. 
    myRectangle.Location = new Point(10, 5);

    // Set the Size property of the rectangle with a width of 200 
    // and a height of 50.
    myRectangle.Size = new Size(200, 50);

    // Create second rectangle to compare to the first.
    Rect myRectangle2 = new Rect();
    myRectangle2.Location = new Point(0, 0);
    myRectangle2.Size = new Size(200, 50);

    // Check if the two Rects are exactly equal using the overloaded equality operator. 
    // areEqual is false because although the size of each rectangle is the same, 
    // the locations are different. 
    bool areEqual = (myRectangle == myRectangle2);

    // Returns false. 
    return areEqual;

}

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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