DnsPermission.Copy Method

Definition

Namespace:

System.Net

Assembly:

System.Security.Permissions.dll

Source:

DnsPermission.cs

Creates an identical copy of the current permission instance.

C#

public override System.Security.IPermission Copy();

Returns

IPermission

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

Examples

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

C#

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();
}

Remarks

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

Applies to