This documentation is archived and is not being maintained.

WebPermission.AddPermission Method (NetworkAccess, Regex)

Adds the specified URI with the specified access rights to the current WebPermission.

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

public void AddPermission(
	NetworkAccess access,
	Regex uriRegex


Type: System.Net.NetworkAccess
A NetworkAccess that specifies the access rights that are granted to the URI.
Type: System.Text.RegularExpressions.Regex
A regular expression that describes the set of URIs to which access rights are granted.


The uriRegex parameter is null.

If you have specified None as the PermissionState, use AddPermission to allow the use of uriRegex in the target class. Specify Accept as the access parameter to add the URI specified by the uriRegex parameter to the list of URI accept strings, or specify Connect as the access parameter to add the URI to the list of URI connect strings.


Calling AddPermission on an Unrestricted WebPermission instance will have no effect as permission is granted to all URIs.


It is recommended that you create uriRegex using the RegexOptions.IgnoreCase, RegexOptions.Compiled, and RegexOptions.Singleline flags.


A candidate URI string is checked against the list of relevant regular expressions (AcceptList or ConnectList) in two ways. First, the candidate URI string is checked against the appropriate list; then, if there is no match, the candidate URI string is converted into a Uri and checked against the appropriate list.

The following example uses AddPermission to give access rights for the specified URI.

    // Create a WebPermission.
    WebPermission myWebPermission1 = new WebPermission();

    // Allow Connect access to the specified URLs.
    myWebPermission1.AddPermission(NetworkAccess.Connect,new Regex("http://www\\.contoso\\.com/.*", 
      RegexOptions.Compiled | RegexOptions.IgnoreCase | RegexOptions.Singleline));


.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.