C#

public class User{
  public int UserID {get;set;}
  public string Username {get;set;}

publict override bool Equals(object obj)
{
  if(!(obj is User)) return false;
  return (obj as User).UserID == UserID;
}

public override int GetHashCode()
{
  //UserID is form the database
  return UserID;
}

public override ToString()
{
  return Username;
}
}

User u1 = new User(){UserID = 1, Username = "FirstUser"};
User u2 = new User(){UserID = 1, Username = "FirstUser"};

var b = u1 == u2;

public Boolean CheckPathName(string pathName, 
                             FileSystemRights rights,
                             AccessControlType type)
{
    Boolean ok = false;
    try
    {
        _accountName = System.Environment.UserDomainName +
                       '\\' + System.Environment.UserName;
        if (Directory.Exists(pathName))
        {
            AddDirectorySecurity(pathName, _accountName, rights, type);
            ok = true;
        }
    }
    catch (InvalidOperationException ex)
    {
        throw ex;
    }            
    return ok;
}

// Adds an ACL entry on the specified directory for the specified account.
public static void AddDirectorySecurity(string FileName, string Account, FileSystemRights Rights, AccessControlType ControlType)
{
    // Create a new DirectoryInfo object.
    DirectoryInfo dInfo = new DirectoryInfo(FileName);
    // Get a DirectorySecurity object that represents the 
    // current security settings. // THROWS EXCEPTION
    DirectorySecurity dSecurity = dInfo.GetAccessControl();
    // Add the FileSystemAccessRule to the security settings. 
    dSecurity.AddAccessRule(new FileSystemAccessRule(Account, Rights, ControlType));
    // Set the new access settings.
    dInfo.SetAccessControl(dSecurity);
}

ManualResetEvent signal = new ManualResetEvent(false);

ManualResetEvent signal = new ManualResetEvent(false);

private void buttonX15_Click(object sender, EventArgs e)
       {
           method_pause();
       }

public void method_pause()
       {

           clip.Pause();
           visular1.Stop();
           visular2.Stop();
           visular3.Stop();
           visular4.Stop();
           visular5.Stop();
           this.pause.Hide();
           signal.WaitOne();
           play.Show();
       }

private void play_Click(object sender, EventArgs e)
      {

          playsub();
          labelX1.Text = "Play";
       }

public void playsub()
       {
           starter = delegate { subt(FName); };
           thread=new Thread(starter);




            try
            {
                thread.Start();
                method_play();

            }
           catch(Exception ex){}

       }