Was this page helpful?
Your feedback about this content is important. Let us know what you think.
Additional feedback?
1500 characters remaining
DeleteValue Method (String, Boolean)
Collapse the table of content
Expand the table of content

RegistryKey.DeleteValue Method (String, Boolean)

Deletes the specified value from this key, and specifies whether an exception is raised if the value is not found.

Namespace:  Microsoft.Win32
Assembly:  mscorlib (in mscorlib.dll)

member DeleteValue : 
        name:string * 
        throwOnMissingValue:bool -> unit 


Type: System.String
The name of the value to delete.
Type: System.Boolean
Indicates whether an exception should be raised if the specified value cannot be found. If this argument is true and the specified value does not exist, an exception is raised. If this argument is false and the specified value does not exist, no action is taken.


name is not a valid reference to a value and throwOnMissingValue is true.


name is a null reference (Nothing in Visual Basic).


The user does not have the permissions required to delete the value.


The RegistryKey being manipulated is closed (closed keys cannot be accessed).


The RegistryKey being manipulated is read-only.

If throwOnMissingValue is false, there is no way to tell if the deletion was successful, without subsequently trying to access the value just deleted. Therefore, use caution when deleting values from the registry in this manner.

On Windows 95, Windows 98, Windows 98 Second Edition, and Windows Millennium Edition, specifying an empty string for the name parameter does not delete the default value.

.NET Framework

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

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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

Community Additions

© 2015 Microsoft