public bool Login(string UserName, string Password, string Domain)
{
string text1 = Domain.Trim();
string text2 = UserName.Trim();
text2 = text2.Replace("/", @"\");
int num1 = text2.IndexOf('\\');
if (num1 != -1)
{
text1 = text2.Substring(0, num1);
text2 = text2.Substring(num1 + 1);
}
else
{
num1 = text2.IndexOf('@');
if (num1 != -1)
{
text1 = text2.Substring(num1 + 1);
text2 = text2.Substring(0, num1);
}
}
return this.authenticateUser(text2, Password.Trim(), text1);
}

private bool authenticateUser(string UserName, string Password, string Domain)
{
bool flag1 = false;
try
{
int num1;
IntPtr ptr1;
if (!WindowsAuth.LogonUser(UserName, Domain, Password, 2, 0, out num1))
{
return flag1;
}
ptr1 = new IntPtr(num1);
WindowsIdentity identity1 = new WindowsIdentity(ptr1);
WindowsPrincipal principal1 = new WindowsPrincipal(identity1);
HttpContext.Current.User = principal1;
FormsAuthentication.SetAuthCookie(principal1.Identity.Name, false);
FormsAuthentication.RedirectFromLoginPage(UserName, false);
flag1 = true;
}
catch (Exception)
{
}
return flag1;
}


[DllImport("advapi32.dll")]
public static extern bool LogonUser(string lpszUsername, string lpszDomain, string lpszPassword, int dwLogonType, int dwLogonProvider, out int phToken);