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Region.MakeEmpty Method

Initializes this Region to an empty interior.

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

public void MakeEmpty()

The following code example demonstrates how to use the Region constructor and MakeEmpty method. This example is designed to be used with Windows Forms. Create a form and paste the following code into it. Call the FillEmptyRegion method in the form's Paint event-handling method, passing e as PaintEventArgs.

private void FillEmptyRegion(PaintEventArgs e)

    // Create a region from a rectangle.
    Rectangle originalRectangle = new Rectangle(40, 40, 40, 50);
    Region smallRegion = new Region(originalRectangle);

    // Call MakeEmpty.

    // Fill the region in red and draw the original rectangle 
    // in black. Note there is nothing filled in.
    e.Graphics.FillRegion(Brushes.Red, smallRegion);
    e.Graphics.DrawRectangle(Pens.Black, originalRectangle);


Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC

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

.NET Framework

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

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

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