EnvironmentPermission.SetPathList Method (EnvironmentPermissionAccess, String)


Sets the specified access to the specified environment variables to the existing state of the permission.

Namespace:   System.Security.Permissions
Assembly:  mscorlib (in mscorlib.dll)

public void SetPathList(
	EnvironmentPermissionAccess flag,
	string pathList


Type: System.Security.Permissions.EnvironmentPermissionAccess

One of the EnvironmentPermissionAccess values.

Type: System.String

A list of environment variables (semicolon-separated).

Exception Condition

The pathList parameter is null.


The flag parameter is not a valid value of EnvironmentPermissionAccess.

The previous state of the current permission is overwritten.

The following code example shows the use of the SetPathList method. This code example is part of a larger example provided for the EnvironmentPermission class.

private bool SetGetPathListDemo()
        Console.WriteLine("Creating an EnvironmentPermission with AllAccess rights for 'TMP'");
        EnvironmentPermission envPerm1 = new EnvironmentPermission(EnvironmentPermissionAccess.AllAccess, "TMP");
        Console.WriteLine("Adding 'TEMP' to the write access list, and 'windir' to the read access list.");
        envPerm1.AddPathList(EnvironmentPermissionAccess.Write, "TEMP");
        envPerm1.AddPathList(EnvironmentPermissionAccess.Read, "windir");
        Console.WriteLine("Read access list before SetPathList = "
            + envPerm1.GetPathList(EnvironmentPermissionAccess.Read));
        Console.WriteLine("Setting read access to 'TMP'");
        envPerm1.SetPathList(EnvironmentPermissionAccess.Read, "TMP");
        Console.WriteLine("Read access list after SetPathList = "
            + envPerm1.GetPathList(EnvironmentPermissionAccess.Read));
        Console.WriteLine("Write access list = " + envPerm1.GetPathList(EnvironmentPermissionAccess.Write));
        Console.WriteLine("Write access environment variables = "
            + envPerm1.GetPathList(EnvironmentPermissionAccess.AllAccess));
    catch (ArgumentException e)
        // EnvironmentPermissionAccess.AllAccess cannot be used as a parameter for GetPathList.
        Console.WriteLine("An ArgumentException occurred as a result of using AllAccess. "
            + " This property cannot be used as a parameter in GetPathList, because it represents "
            + "more than one type of environment variable : \n" + e);

    return true;

.NET Framework
Available since 1.1
Return to top