Hi chetan,
Refer below code.
Code
C#
protected void Page_Load(object sender, EventArgs e)
{
    using (SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["constr"].ConnectionString))
    {
        string query = "SELECT O.OrderId, O.ShippedDate, C.CompanyName, C.City FROM Orders O INNER JOIN Customers C ON O.CustomerId = C.CustomerId WHERE OrderId = @OrderId";
        using (SqlCommand cmd = new SqlCommand(query, con))
        {
            cmd.Parameters.AddWithValue("@OrderId", 10643);
            con.Open();
            cmd.ExecuteReader();
            con.Close();
        }
    }
}
VB.Net
Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
    Using con As SqlConnection = New SqlConnection(ConfigurationManager.ConnectionStrings("constr").ConnectionString)
        Dim query As String = "SELECT O.OrderId, O.ShippedDate, C.CompanyName, C.City FROM Orders O INNER JOIN Customers C ON O.CustomerId = C.CustomerId WHERE OrderId = @OrderId"
        Using cmd As SqlCommand = New SqlCommand(query, con)
            cmd.Parameters.AddWithValue("@OrderId", 10643)
            con.Open()
            cmd.ExecuteReader()
            con.Close()
        End Using
    End Using
End Sub