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DnsPermission.Copy Method

Creates an identical copy of the current permission instance.

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

public override IPermission Copy ()
public IPermission Copy ()
public override function Copy () : IPermission
Not applicable.

Return Value

A new instance of the DnsPermission class that is an identical copy of the current instance.

A copy of a DnsPermission instance provides the same access to DNS servers as the original permission instance.

The following example creates an identical copy of an existing DnsPermission instance.

public void UseDns() {
   // Create a DnsPermission instance.
   DnsPermission myPermission = new DnsPermission(PermissionState.Unrestricted);
   // Check for permission.
   myPermission.Demand();
   // Create an identical copy of the above 'DnsPermission' object.
   DnsPermission myPermissionCopy = (DnsPermission)myPermission.Copy();
   Console.WriteLine("Attributes and Values of 'DnsPermission' instance :");
   // Print the attributes and values.
   PrintKeysAndValues(myPermission.ToXml().Attributes);
   Console.WriteLine("Attribute and values of copied instance :");
   PrintKeysAndValues(myPermissionCopy.ToXml().Attributes);
}

private void PrintKeysAndValues(Hashtable myHashtable) {
   // Get the enumerator that can iterate through the hash table.
   IDictionaryEnumerator myEnumerator = myHashtable.GetEnumerator();
   Console.WriteLine("\t-KEY-\t-VALUE-");
   while (myEnumerator.MoveNext())
      Console.WriteLine("\t{0}:\t{1}", myEnumerator.Key, myEnumerator.Value);
   Console.WriteLine();
}

public void UseDns()
{
    // Create a DnsPermission instance.
    DnsPermission myPermission = new DnsPermission(PermissionState.
        Unrestricted);

    // Check for permission.
    myPermission.Demand();

    // Create an identical copy of the above 'DnsPermission' object.
    DnsPermission myPermissionCopy = (DnsPermission)myPermission.Copy();
    Console.WriteLine("Attributes and Values of 'DnsPermission' "
        + "instance :");
    // Print the attributes and values.
    PrintKeysAndValues(myPermission.ToXml().get_Attributes());
    Console.WriteLine("Attribute and values of copied instance :");
    PrintKeysAndValues(myPermissionCopy.ToXml().get_Attributes());
} //UseDns

private void PrintKeysAndValues(Hashtable myHashtable)
{
    // Get the enumerator that can iterate through the hash table.
    IDictionaryEnumerator myEnumerator = myHashtable.GetEnumerator();
    Console.WriteLine("\t-KEY-\t-VALUE-");
    while (myEnumerator.MoveNext()) {
        Console.WriteLine("\t{0}:\t{1}", myEnumerator.get_Key(),
            myEnumerator.get_Value());
    }
    Console.WriteLine();
} //PrintKeysAndValues

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0
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