C#

using TypeBindConflicts;  
public class Test   
{  
   public static void Main()   
   {  
      AggPubImpAggPubImp n6 = new AggPubImpAggPubImp();  
   }  
}

namespace Name_Common
{
    public struct St_Common
    {   
       public string Languaje;
    }

    public static partial class Cls_Common
    {   // I define the structure so that there is no error in compiling.
        public static Name_Common.St_Common StCommon;
    }
}

---------------
public class Cls_Encrypt
{
    public Cls_Encrypt()  // Constructor.
    {  // Example line:
       if (Name_Common.Cls_Common.StCommon.Languaje == "Eng") ... 
    }
}

namespace Name_Main
{
    public Cls_Main() 
    {
       // At this line, no error event occurs. But if in the debugger I query by Name_Common.Cls_Common.StCommon, it appears:
       // Name_Common.Cls_Common.StCommon error CS0433: type 'Cls_Common' exists in 'Cls_Encrypt, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' and in 'Main, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'

       Name_Common.Cls_Common.StCommon = new Name_Common.St_Common();

       // The execution continues, but in the line:
       string MyVar = Name_Common.Cls_Common.StCommon.Languaje;

       // The exception occurs:
       // + ErrorExcp {"Object reference not set to an instance of an object."} System.Exception {System.NullReferenceException} HResult -2147467261
    }
}

how to store the value selection on calendar in database

WebClient webClient = new WebClient();
webClient.UseDefaultCredentials = false;
webClient.Credentials = new NetworkCredential(strUsername, strPassword);
webClient.Headers.Add("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; .NET CLR 1.0.3705;)");
webClient.DownloadFile(url, @strOutputFile);

SpeechSynthesizer ss;
        private void Form1_Load(object sender, EventArgs e)
        {
            ss = new SpeechSynthesizer();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            //Read (button_click)
            ss.Rate = SpeedTrackBar.Value; //sets speed
            ss.Volume = VolumeTrackBar.Value; //sets volume
            try
            {
                switch (comboBox1.SelectedIndex)
                {
                    case 0:
                        ss.SelectVoiceByHints(VoiceGender.NotSet);
                        break;
                    case 1:
                        ss.SelectVoiceByHints(VoiceGender.Male);
                        break;
                    case 2:
                        ss.SelectVoiceByHints(VoiceGender.Female);
                        break;
                    case 3:
                        ss.SelectVoiceByHints(VoiceGender.Neutral);
                        break;
                    default:
                        break;
                }
                ss.SpeakAsync(textBox1.Text);
            }
            catch(Exception ex)
            {
                MessageBox.Show(ex.Message, "Message", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            //Pause (button_click)
            ss.Pause();
        }

        private void button3_Click(object sender, EventArgs e)
        {
            //Continue (button_click)
            ss.Resume();
        }

        private void button4_Click(object sender, EventArgs e)
        {
            //Record (button_click)
            SpeechSynthesizer ss = new SpeechSynthesizer();
            ss.Rate = SpeedTrackBar.Value;
            ss.Volume = VolumeTrackBar.Value;
            SaveFileDialog sfd = new SaveFileDialog();
            sfd.Filter = "Wave Files| *.wav";
            sfd.ShowDialog();
            ss.SetOutputToWaveFile(sfd.FileName);
            ss.Speak(textBox1.Text);
            ss.SetOutputToDefaultAudioDevice();
            MessageBox.Show("Recording Completed..", "T2S");
        }