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c#ftpftp-client

C# connecting explicit FTP using system.net.FtpClient - certificate error

I am using the System.Net.FtpClient and I an trying to connect to a server (don't have access to the code in server). when I connect using Winscp/Filezile I succeeded to connect. however when I am using C# I am getting this exception:" 'The remote certificate is invalid according to the validation procedure.'"

not sure what am I doing wrong attaching my code and a photo when I connect using filezila

 System.Net.FtpClient.FtpClient _ftpClient = new System.Net.FtpClient.FtpClient();
            _ftpClient.Host = Host;
            _ftpClient.Port = 990;
            _ftpClient.Credentials = new System.Net.NetworkCredential(UserName, Password);                
            _ftpClient.SslProtocols = System.Security.Authentication.SslProtocols.Tls;
            _ftpClient.EncryptionMode = System.Net.FtpClient.FtpEncryptionMode.Explicit;
            _ftpClient.Connect();

enter image description here

Solution

  • Implementation is the same as fluent ftp:

    _ftpClient.ValidateCertificate += 
_ftpClient_ValidateCertificate1;

private static void 
_ftpClient_ValidateCertificate(System.Net.FtpClient.FtpClient 
control, System.Net.FtpClient.FtpSslValidationEventArgs e)
    {
        e.Accept = true;
    }