DnsEndPoint Constructor (String, Int32, AddressFamily)
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Initializes a new instance of the DnsEndPoint class with the host name or string representation of an IP address, a port number, and an address family.
Assembly: System.Net (in System.Net.dll)
'Declaration Public Sub New ( _ host As String, _ port As Integer, _ addressFamily As AddressFamily _ )
Parameters
- host
- Type: System.String
The host name or a string representation of the IP address.
- port
- Type: System.Int32
The port number associated with the address, or 0 to specify any available port. port is in host order.
- addressFamily
- Type: System.Net.Sockets.AddressFamily
One of the AddressFamily values.
| Exception | Condition |
|---|---|
| ArgumentException | The host parameter contains an empty string -or- the addressFamily parameter is specified as Unknown. |
| ArgumentNullException | The host parameter is Nothing. |
| ArgumentOutOfRangeException | port is less than 0 -or- port is greater than 0xffff. |
The DnsEndPoint(String, Int32, AddressFamily) constructor can be used to initialize a DnsEndPoint class using either a host name or a string that represents an IP address, a port, and an address family.
When using the constructor with a host name rather than a string representation of an IP address, the address family restricts DNS resolution to prefer addresses of the specified address family value. When using the constructor with the address family specified as Unknown, the address family is determined by the address family of the first IP address that resolves to the endpoint when used by a Socket.