This documentation is archived and is not being maintained.

RegistryKey.ValueCount Property

Retrieves the count of values in the key.

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

public int ValueCount { get; }

Property Value

Type: System.Int32
The number of name/value pairs in the key.


The user does not have read permission for the key.


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


The user does not have the necessary registry rights.


A system error occurred, for example the current key has been deleted.

Each registry key has a default value that is not associated with any name. This unnamed value can be set by using the SetValue method and specifying either null or the empty string ("") for name. If the default value has never been set, it does not contribute to the total count returned by the ValueCount property; once it has been set, however, it is always counted.

This code example is part of a larger example provided for the RegistryKey class.

// Print the information from the Test9999 subkey.
Console.WriteLine("There are {0} subkeys under {1}.", 
    test9999.SubKeyCount.ToString(), test9999.Name);
foreach(string subKeyName in test9999.GetSubKeyNames())
        tempKey = test9999.OpenSubKey(subKeyName))
        Console.WriteLine("\nThere are {0} values for {1}.", 
            tempKey.ValueCount.ToString(), tempKey.Name);
        foreach(string valueName in tempKey.GetValueNames())
            Console.WriteLine("{0,-8}: {1}", valueName, 

.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.