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InvalidEnumArgumentException Class

The exception thrown when using invalid arguments that are enumerators.

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

[HostProtectionAttribute(SecurityAction.LinkDemand, SharedState = true)]
public class InvalidEnumArgumentException : ArgumentException


The HostProtectionAttribute attribute applied to this type or member has the following Resources property value: SharedState. The HostProtectionAttribute does not affect desktop applications (which are typically started by double-clicking an icon, typing a command, or entering a URL in a browser). For more information, see the HostProtectionAttribute class or SQL Server Programming and Host Protection Attributes.

This exception is thrown if you pass an invalid enumeration value to a method or when setting a property.

The following code example shows how to catch an InvalidEnumArgumentException exception and interpret its content. The example attempts to pass an invalid enumeration value (MessageBoxButtons) through casting, as the MessageBox.Show method's third argument. Upon catching the exception, the example fetches the respective error message, the invalid parameter, stack trace, and origin of the exception.

		// Attempts to pass an invalid enum value (MessageBoxButtons) to the Show method
		    MessageBoxButtons myButton= (MessageBoxButtons) 123;
		    MessageBox.Show("This is a message","This is the Caption",myButton);
		catch(InvalidEnumArgumentException invE) 


Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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

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