Using Session.PutFile() with stream, returns error Operation not supported

using (var session = new Session()) {
    if (!session.Opened)
        session.Open(sessionOptions);
 
    var transferOptions = new TransferOptions {
        TransferMode = TransferMode.Binary,
        OverwriteMode = OverwriteMode.Overwrite,   
    };
 
    using (var stream = new MemoryStream(imgData)) {
        session.PutFile(stream, remoteFilePath, transferOptions);
    }
}

FtpSessionOptions := FtpSessionOptions.SessionOptions;
FtpSessionOptions.Protocol := FtpProtocol.Ftp;
FtpSessionOptions.HostName := Host;
FtpSessionOptions.UserName := Username;
FtpSessionOptions.Password := Password;
FtpSessionOptions.FtpSecure := FtpSecure.Explicit;
FtpSessionOptions.GiveUpSecurityAndAcceptAnyTlsHostCertificate := TRUE;
 
FtpSession := FtpSession.Session;
FtpSession.ExecutablePath(ExePath);
FtpSession.Open(FtpSessionOptions);
 
MemoryStream := FtpSession.GetFile(Path, FtpTransferOptions);
MemoryStream.Position := 0; // Gives the error