How to fix the scaling of only Y-Axis in ASP.Net Chart

I am using asp chart (framework 4.0) in one of the web page.

Chart displays x and y points from database. I want to fix the scaling of only Y-axis i.e., between 1 to -1 as y axis point will lie within 1 to -1, as below:

1 0.75 0.50 0.25 0      ----------------------------------------------- -0.25 -0.50 -0.75 -1

C# code:

                Chart1.Visible = true;
                
                string id = Request.QueryString[1].ToString();

                string query = "SELECT x,y from Table where ID= '" + id + "' and DeletionDate is null";
                DataTable dt = GetData(query);
                

                string[] x = new string[dt.Rows.Count];
                double[] y = new double[dt.Rows.Count];

                for (int i = 0; i < dt.Rows.Count; i++)
                {
                    x[i] = dt.Rows[i][0].ToString();
                    y[i] = Convert.ToDouble(dt.Rows[i][1]);
                }
                Chart1.Series[0].Points.DataBindXY(x, y);
                Chart1.Series[0].ChartType = SeriesChartType.Line;
                Chart1.ChartAreas["ChartArea1"].Area3DStyle.Enable3D = false;
                Chart1.Legends[0].Enabled = true;

                Color col = ColorTranslator.FromHtml("#cc99cc");
                Chart1.ChartAreas["ChartArea1"].AxisX.LineColor = col;
                Chart1.ChartAreas["ChartArea1"].AxisX.LineWidth = 2;

                Chart1.ChartAreas["ChartArea1"].AxisY.LineColor = col;
                Chart1.ChartAreas["ChartArea1"].AxisY.LineWidth = 2;

HTML code:

<asp:Chart ID="Chart1" runat="server" Height="300px" Width="400px" Visible="false" BorderlineColor="#e5e4e2" BorderlineWidth="2" BorderlineDashStyle="Solid">
    <Titles>
        <asp:Title ShadowOffset="3" Name="Items"/>
    </Titles>
    <Legends>
        <asp:Legend Alignment="Center" Docking="Bottom" IsTextAutoFit="False" Name="Default" LegendStyle="Row" />
    </Legends>
    <Series>
        <asp:Series Name="Line" ChartType="Line" BorderWidth="1" MarkerStyle="Circle" MarkerBorderWidth="3" MarkerBorderColor="Blue" Color="DarkBlue"/>
    </Series>
    <ChartAreas>
        <asp:ChartArea Name="ChartArea1"/>
    </ChartAreas>
</asp:Chart>

Please reply how to achieve that.