C#

//client.cs

        public delegate void kill(string msg);

        public event kill Kill; 

        if (!clientSocket.Connected)
        {
             Kill("Server connection broken");
             return;
        }

//main.cs
        Client clnt = null;

        private void ms_Startclient_Click(object sender, EventArgs e)
        {
            if (ms_Startclient.Checked)
            {
                clnt = new Client();
                clnt.Kill += new Client.kill(clnt_Kill);
            }
            else
            {
                clnt = null;
            }
        }

        void clnt_Kill(string msg)
        {
            clnt = null;
            MessageBox.Show(msg);
            ms_Startclient.Checked = false;
        }

void clnt_Kill(string msg)        <br />
{           <br />
clnt.Kill -= new Client.kill(clnt_Kill);<br />
clnt = null;            <br />
MessageBox.Show(msg);            <br />
ms_Startclient.Checked = false;        <br />
}

Gjm wrote:

Is it possible to make an exe executing all the time online in some other online service or machine

prasadbuddhika wrote:

as i read if you compare two nullable types that both are having null it should be true

prasadbuddhika wrote:

ut i get the false (as in the code "x is less than y " )

if (x > y) // In your example you used operator >= as in "x is greater or equal than y"
{
      Console.WriteLine("x is greater than y ");
}
else if (x < y)
{
      Console.WriteLine("x is less than y ");
}

static void Main(string[] args) {
  int? x = null; 
  int? y = null;
  Compare(x, y);
  x = 1;
  Compare(x, y);
  Console.ReadLine();
}

private static void Compare(int? x, int? y) {
  Console.WriteLine("{0} >= {1} {2}", x == null ? "null" : x.ToString(), y == null ? "null" : y.ToString(), x >= y);
  Console.WriteLine("{0} > {1} {2}", x == null ? "null" : x.ToString(), y == null ? "null" : y.ToString(), x > y);
  Console.WriteLine("{0} == {1} {2}", x == null ? "null" : x.ToString(), y == null ? "null" : y.ToString(), x == y);
  Console.WriteLine("{0} < {1} {2}", x == null ? "null" : x.ToString(), y == null ? "null" : y.ToString(), x < y);
  Console.WriteLine("{0} <= {1} {2}", x == null ? "null" : x.ToString(), y == null ? "null" : y.ToString(), x <= y);
  Console.WriteLine();
}

/*
null >= null False
null > null False
null == null True
null < null False
null <= null False

1 >= null False
1 > null False
1 == null False
1 < null False
1 <= null False
 */

Class Sample
  Public Shared Sub Main() 
    Dim x as Nullable(Of Int32): Dim y as Nullable(Of Int32) 
    x = Nothing: y = Nothing
    Compare(x, y)
    x = 1
    Compare(x, y)
    x = Nothing: y = 1
    Compare(x, y)
    Console.ReadLine()
  End Sub
  
  Public Shared Sub Compare(x as Nullable(Of Int32), y as Nullable(Of Int32))
    Dim xvalue as String: Dim yvalue as String
    If x.HasValue Then
      xvalue = x.ToString()
    Else
      xvalue = "Nothing"
    End If
    If y.HasValue Then
      yvalue = y.ToString()
    Else
      yvalue = "Nothing"
    End If
    Console.WriteLine("Nullable.Equals({0}, {1}) {2}", xvalue, yvalue, Nullable.Equals(x, y))
    Console.WriteLine("Nullable.Compare({0}, {1}) {2}", xvalue, yvalue, Nullable.Compare(x, y))
    Console.WriteLine()
  End Sub
End Class

Nullable.Equals(Nothing, Nothing) True
Nullable.Compare(Nothing, Nothing) 0

Nullable.Equals(1, Nothing) False
Nullable.Compare(1, Nothing) 1

Nullable.Equals(Nothing, 1) False
Nullable.Compare(Nothing, 1) -1

Alan N wrote:

I knew I'd never get that past you