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ToolStripMenuItem.CheckState Property

Gets or sets a value indicating whether a ToolStripMenuItem is in the checked, unchecked, or indeterminate state.

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

[BindableAttribute(true)]
public CheckState CheckState { get; set; }

Property Value

Type: System.Windows.Forms.CheckState
One of the System.Windows.Forms.CheckState values. The default is Unchecked.

ExceptionCondition
InvalidEnumArgumentException

The CheckState property is not set to one of the System.Windows.Forms.CheckState values.

Use the CheckState property to control or determine whether a ToolStripMenuItem is initially checked, unchecked, or in an indeterminate state.

Starting with the .NET Framework 4.5.2, if the CheckState property is set to Checked or Indeterminate, the corresponding icon may be resized. Resizing is determined by the system DPI setting when the app.config file contains the following entry:

<appSettings>
  <add key="EnableWindowsFormsHighDpiAutoResizing" value="true" />
</appSettings>

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
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