C#

this.ds.Load(dal.GetData(cmd1).CreateDataReader(), LoadOption.OverwriteChanges, new string[] { "transaction1" });

this.ds.Tables[0].Clear(); // error in this line

Cannot find table 0

public class ControlEx : System.Windows.Forms.UserControl {

    private bool isDragging = false;
    private int clickOffsetX, clickOffsetY;
    KineticaRT.Controls.Dial lblDragger;

    public ControlEx (System.Windows.Forms.TabPage tabPage) {
        this.lblDragger = new KineticaRT.Controls.Dial();
        this.lblDragger.Enabled = true;
        tabPage.Controls.Add(this.lblDragger);
        this.MouseUp += new System.Windows.Forms.MouseEventHandler(controlEx_MouseUp);
        this.MouseMove += new System.Windows.Forms.MouseEventHandler(controlEx_MouseMove);
        this.MouseDown += new System.Windows.Forms.MouseEventHandler(controlEx_MouseDown);
    }

    private void controlEx_MouseDown (System.Object sender, System.Windows.Forms.MouseEventArgs e) {
        isDragging = true;
        clickOffsetX = e.X;
        clickOffsetY = e.Y;
    }

    private void controlEx_MouseUp (System.Object sender, System.Windows.Forms.MouseEventArgs e) {
        isDragging = false;
    }

    private void controlEx_MouseMove (System.Object sender, System.Windows.Forms.MouseEventArgs e) {
        if (isDragging == true) {
            this.Left = e.X + this.Left - clickOffsetX;
            this.Top = e.Y + this.Top - clickOffsetY;
        }
    }

    private void InitializeComponent() {
        this.SuspendLayout();
        //
        // ControlEx
        //
        this.Name = "ControlEx";
        this.ResumeLayout(false);
    }

}

private ControlEx dial;
private void button1_Click(object sender, EventArgs e) {
    if (tcDataPanes.TabCount == 0) {
        TabPageEx tabpage = new TabPageEx(tcDataPanes);
    }

    dial = new ControlEx(tcDataPanes.SelectedTab);
}