ISerializable - Roy Osherove's Blog

I too thought it was pretty cool when I first saw it, but frankly I've never found a use for it in real code, so I'm not sure how useful it actually is.

There's no equivalent in C#.

You don't get a DivideByZeroException because you're using the floating point division operator (/) and not the integer division one (\). Only integer division by zero throws, floating point generates NAN or infinity or something like that.

Bah, Mattias beat me to it! Something to talk about in the blog at some point, I guess...

0/0 is NaN (Not a Number). If x>0, then x/0 is Infinity ; if x<0, then x/0 is -Infinity. It's defined in the rules of IEEE (some number which I definitely don't know off the top of my head) floating point numbers somewhere.

Incidentally, you can definitely get the same behavior in C#, as per...

private void button1_Click(object sender, System.EventArgs e)
{
int x = int.Parse(textBox1.Text);
try
{
MessageBox.Show(((double) x/ (double) x).ToString());
}
catch(Exception ex)
{
this.Text = ex.Message;
}
}

I think the bigger picture is you shouldn't be using exception handling to catch divide by zero errors. Logic! Logic! Logic! :)

How to show the exceptio via messegebox here: HELP

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
' for Add button of clients bill form
Try
i1 = NumericUpDown2.Value
tot = tot + i1
TextBox13.Text = tot
C1 = DataSet41.Clientbill1.NewClientbill1Row()
C1("Branch_ss") = TextBox1.Text
C1("Name_s") = TextBox2.Text
C1("City_s") = TextBox3.Text
C1("Ref_s") = TextBox4.Text
C1("Billno_s") = TextBox5.Text
C1("Billdate_ss") = TextBox6.Text
C1("Estno_s") = TextBox7.Text
C1("Estdate_s") = TextBox8.Text
C1("Nameofpub_s") = TextBox9.Text
C1("Size_s") = TextBox10.Text
C1("Insertiondate_s") = TextBox11.Text
C1("Totalspace_s") = TextBox12.Text
C1("Rate_s") = NumericUpDown1.Value
C1("Grossamount_s") = NumericUpDown2.Value
C1("Total_s") = TextBox13.Text
DataSet41.Clientbill1.AddClientbill1Row(C1)
'OleDbDataAdapter1.ContinueUpdateOnError = True
' If DataSet41.HasChanges = True Then
' MsgBox("hi")
'OleDbUpdateCommand1.ExecuteNonQuery()
OleDbDataAdapter1.Update(DataSet41)
Catch ex As Exception
'MessageBox()
End Try
'End If

End Sub

just use ex.ToString() or ex.Message in your messagebox.