Hi @fahimahmed,
Try this sample..
Html.
 
 <div>
        Min Range:<asp:TextBox ID="txtMinRange" runat="server" /><br />
        Max Range:
        <asp:TextBox ID="txtMaxRange" runat="server"></asp:TextBox>
        <br />
        <asp:Button Text="Save" runat="server" OnClick="Save" />
    </div>
Code
protected void Save(object sender, EventArgs e)
        {
            SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["ConString"].ConnectionString);
            for (int minRange = int.Parse(this.txtMinRange.Text.Trim()); minRange <= int.Parse(this.txtMaxRange.Text.Trim()); minRange++)
            {
                SqlCommand cmd = new SqlCommand("INSERT INTO SeriesRecords VALUES(@Id,@Series)", con);
                con.Open();
                cmd.Parameters.AddWithValue("@Id", minRange);
                cmd.Parameters.AddWithValue("@Series", minRange);
                cmd.ExecuteNonQuery();
                con.Close();
            }
        }
Namespaces
using System;
using System.Data.SqlClient;
using System.Configuration;
Warm Regards:-