How to Insert numbers into Excel using OLEDB and C#

Question

I am inserting values into excel document using OLEDB in my website written in ASP.NET(C#).
When I insert numbers, they are inserted as strings instead of numbers. 

How do I convert string to numbers programmically and insert them into excel as number NOT strings?
My code:-
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            string connString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + MYExcelFile + ";Extended Properties=Excel 8.0";
            OleDbConnection MyConnection;
            OleDbCommand myCommand = new System.Data.OleDb.OleDbCommand();
            string sql = null;
            MyConnection = new OleDbConnection(connString);
            MyConnection.Open();
            myCommand.Connection = MyConnection;
         
            string tempTitle1 = "Title1";
            string tempTitleField1 = "[" + tempTitle1 + "]";
            string tempTitle2 = "Title2";
            string tempTitleField2 = "[" + tempTitle2 + "]";
            string tempTitle3 = "Title3";
            string tempTitleField3 = "[" + tempTitle3 + "]";

            sql = "Insert into " + MyRangeName + " (" + tempTitleField1 + "," +
            tempTitleField2 + "," + tempTitleField3 + ") values('" + Value1 +
            "','" + Value2 + "','" + Value3 + "')";
            myCommand.CommandText = sql;
            myCommand.ExecuteNonQuery();
            MyConnection.Close();
         
Thanks so much,