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Rectangle.Contains Method (Rectangle)

Determines if the rectangular region represented by rect is entirely contained within this Rectangle structure.

Namespace:  System.Drawing
Assembly:  System.Drawing (in System.Drawing.dll)

public bool Contains(
	Rectangle rect


Type: System.Drawing.Rectangle

The Rectangle to test.

Return Value

Type: System.Boolean
This method returns true if the rectangular region represented by rect is entirely contained within this Rectangle structure; otherwise false.

The containing rectangle must be normalized for this method to return accurate results.

The following code example demonstrates the Contains method and the SystemPens class. This example is designed for use with a Windows Form. Paste this code into a form that contains a button named Button1, call DrawFirstRectangle from the form's constructor or Load method, and associate the Button1_Click method with the button's Click event.

Rectangle rectangle1 = new Rectangle(70, 70, 100, 150);

private void DrawFirstRectangle()
        SystemColors.Highlight, FrameStyle.Thick);

private void Button1_Click(object sender, EventArgs e)

    // Get the bounds of the screen.
    Rectangle screenRectangle = Screen.PrimaryScreen.Bounds;

    // Check to see if the rectangle is within the bounds of the screen. 
    if (screenRectangle.Contains(rectangle1))

        // If so, erase the previous rectangle.
            SystemColors.Highlight, FrameStyle.Thick);

        // Call the Offset method to move the rectangle.
        rectangle1.Offset(20, 20);

        // Draw the new, offset rectangle.
            SystemColors.Highlight, FrameStyle.Thick);

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.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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