怎么解析一个域名对应的IP是什么

如何解析一个域名对应的IP是什么？
如何写代码？asp.net，C#

[解决办法]
using System.Net;

IPHostEntry hostInfo = Dns.GetHostByName( "www.contoso.com ");
Response.Write(hostInfo.AddressList[0]);
[解决办法]
IPHostEntry Host = Dns.GetHostEntry(Address);
[解决办法]
System.Net.IPHostEntry hostInfo = System.Net.Dns.GetHostByName( "www.csdn.net "); Response.Write(hostInfo.AddressList[0]);