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Regex.CacheSize Property

Gets or sets the maximum number of entries in the current static cache of compiled regular expressions.

Namespace:  System.Text.RegularExpressions
Assembly:  System (in System.dll)

public static int CacheSize { get; set; }

Property Value

Type: System.Int32
The maximum number of entries in the static cache.


The value in a set operation is less than zero.

The Regex class maintains an internal cache of compiled regular expressions used in static method calls. If the value specified in a set operation is less than the current cache size, cache entries are discarded until the cache size is equal to the specified value.

By default, the cache holds 15 compiled regular expressions. Your application typically will not need to modify the size of the cache. Use the CacheSize property in the rare situation when you need to turn off caching or you have an unusually large cache.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.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.