C#

Protected Sub btnStep2_Click(ByVal sender As Object, ByVal e As System.EventArgs)
        Dim bTest As Boolean
        Dim iNum As Integer

        'Integer.TryParse is used to see if the compiler can convert
        '  the string to an Integer
        '  It returns a Boolean and if successful
        '  iNum will hold the numeric result.
        bTest = Integer.TryParse(txtStep2.Text, iNum)
        lblData.Text = "Is it a number: " & bTest.ToString()
    End Sub

protected void btnStep2_Click(object sender ,  System.EventArgs e )
       bool bTest = false;
       int iNum = Integer;
{ 
        // Integer.TryParse is used to see if the compiler can convert
        //  the string to an Integer
        //  It returns a Boolean and if successful
        //  iNum will hold the numeric result.
        bTest = Integer.TryParse(txtStep2.Text, iNum);
        lblData.Text = "Is it a number: " & bTest.ToString();
    }

private void treeView1_AfterSelect(object sender, TreeViewEventArgs e)
        {
            {
                if (treeView1.SelectedNode == null)
                {
                    this.Text = "null";
                }
                else
                {
                    if (treeView1.SelectedNode.Name == "Node1")
                    {
                        panel2.Visible = false;
                        panel1.Visible = true;
                        this.Text = "panel1 + | panel2 -";
                    }
                    else if (treeView1.SelectedNode.Name == "Node2")
                    {
                        panel1.Visible = false;
                        panel2.Visible = true; //this does nothing?
                        this.Text = "panel1 - | panel2 +";
                    }
                }

            }