ShootBlues.Script.AddEndpointDialog.RefreshEnabledState C# (CSharp) Method

        private void RefreshEnabledState(object sender, EventArgs e)
        {
            OKButton.Enabled = ((EndpointName.Text ?? "").Length > 0) &&
                ((Server.Text ?? "").Length > 0) &&
                ((Username.Text ?? "").Length > 0) &&
                ((Password.Text ?? "").Length > 0) &&
                (
                    (SendToGroupChat.Checked && (ChatChannel.Text ?? "").Length > 0) ||
                    (SendToUser.Checked && (ToUsername.Text ?? "").Length > 0)
                );
        }