.net下模拟不同身份登陆以获取不同权限

不管是asp.net、web service还是window service，程序运行的时候只有本地计算机的部分权限，有时候需要更大的权限，比如读写某台服务器或域中的一台计算机上的文件等，这就需要更大的权限，比如域帐户权限。
通过获取不同身份的WindowsImpersonationContext对象，可以模拟不同用户登陆，请看我生成的NetworkSecurity类的
public static WindowsImpersonationContext ImpersonateUser(string strDomain,
string strLogin,
string strPwd,
LogonType logonType,
LogonProvider logonProvider)；
附NetworkSecurity.cs源代码如下：
/*
* Author : TongWei
* Date : 2005-1-25
* Rights : China Netwave Inc.@2005
*/
using System;
using System.Runtime.InteropServices;
using System.Security.Principal;
using System.Security.Permissions;
namespace CNW.OMP.Common.Utility
{
public enum LogonType : int
{
/// <summary>
/// This logon type is intended for users who will be interactively using the computer, such as a user
/// being logged on by a terminal server, remote shell, or similar process. This logon type has the
/// additional expense of caching logon information for disconnected operation, and is therefore
/// inappropriate for some client/server applications, such as a mail server.
/// </summary>
LOGON32_LOGON_INTERACTIVE = 2,

/// <summary>
/// This logon type is intended for high performance servers to authenticate clear text passwords.
/// The LogonUser function does not cache credentials for this logon type.

补充：asp.net教程,基础入门