SSH.Net creating user account

I'm trying to use SSH.NET to activate user accounts on my Linux Ubuntu VPS server.

I'm using the following code:

public void CreateUser()
{
    var connectionInfo = new Renci.SshNet.PasswordConnectionInfo("serverip", "root", "serverpassword");   
    using (var ssh = new Renci.SshNet.SshClient(connectionInfo))
    {
        string username = tbUser.Text;
        string password = tbPass.Text;
        ssh.Connect();
        var command = ssh.RunCommand("useradd " + username + " -s /bin/false");
        command.Execute();
        command = ssh.RunCommand("passwd " + password);
        command.Execute();
        command = ssh.RunCommand(password);
        command.Execute();
        command = ssh.RunCommand(password);
        command.Execute();
        ssh.Disconnect();
    }
}

When manually creating a user, I would run useradd username -s /bin/false (to give the user no ssh access). Then I would run passwd username.

This is where my error comes in. The application just freezes when running the passwd + password command. I think it's because Linux asks you to enter the password and ssh.net thinks that it's waiting for a response. When I just run the first (useradd) command, then the user is added and the program doesn't freeze. It just freezes with the second RunCommand.

Is there any way to create user accounts in the way I'm trying to do this using SSH.Net?

Thanks!

Changing the double quotes to single quotes worked for me:

ssh.Connect();

var command = ssh.CreateCommand("useradd " + username + " -s /bin/false");
command.Execute();

command = ssh.CreateCommand("echo '" + username + ":" + password + "' >> create.txt");
command.Execute();
command = ssh.CreateCommand("chpasswd < create.txt");
command.Execute();
command = ssh.CreateCommand("rm create.txt");
command.Execute();

ssh.Disconnect();