利用PrincipalContext验证域账号密码是否有效

using System.DirectoryServices.AccountManagement;

//利用PrincipalContext验证域账号密码是否有效
public bool IsValid(string accountName, string password)
{
    
    
	string domain = Path.GetDirectoryName(accountName);
	string userName = Path.GetFileName(accountName);
	using (var PC = new PrincipalContext(ContextType.Domain, domain))
	{
    
    
		return PC.ValidateCredentials(userName, password);
	}
}

//验证当前用户是否属于administrators

public bool IsCurrentUserAdminstrator()
{
    
    
    try
    {
    
    
		var user = WindowsIdentity.GetCurrent();
		var principal = new WindowsPrincipal(user);
		return principal.IsInRole(WindowsBuiltInRole.Administrator);
    }
    catch (UnauthorizedAccessException)
    {
    
    
		return false;
    }
}