How to append data coloms in a worksheet from a data table in excel interop C#

I have 3 tables having almost same data and same data colom.I need to expoert this 3 table together to one excel sheet side by side. i have 3 datatable ,each dt have 2 cloms so my excel should have  2+2+2= 6 coloms.How can i add like this? below is my methods.where i have to change? please help.I am allowed to use excel interop only

    public static void CreateExcelSheet(DataSet result, string excelPath)

    {
 var ds= new DataSet();

DataTable dt1 = new DataTable();

dt1.Columns.Add("Name", typeof(string));

dt1.Columns.Add("Age", typeof(int));

// Create a DataRow, add Name and Age data, and add to the DataTable

DataRow dr1 = dt1.NewRow();

dr1["Name"] = "Mohammadsd"; // or dr[0]="Mohammad";

dr1["Age"] = 24; // or dr[1]=24;

dt1.Rows.Add(dr1);

result.Tables.Add(dt1);



DataTable dt2 = new DataTable();

dt2.Columns.Add("Name", typeof(string));

dt2.Columns.Add("Age", typeof(int));

// Create a DataRow, add Name and Age data, and add to the DataTable

DataRow dr2 = dt2.NewRow();

dr2["Name"] = "Mohammad"; // or dr[0]="Mohammad";

dr2["Age"] = 24; // or dr[1]=24;

dt2.Rows.Add(dr2);

result.Tables.Add(dt2);



DataTable dt3 = new DataTable();

dt3.Columns.Add("Name", typeof(string));

dt3.Columns.Add("sex", typeof(int));

// Create a DataRow, add Name and Age data, and add to the DataTable

DataRow dr3 = dt3.NewRow();

dr3["Name"] = "last"; // or dr[0]="Mohammad";

dr3["sex"] = 24; // or dr[1]=24;

dt3.Rows.Add(dr3);

ds.Tables.Add(dt3);






        object misValue = System.Reflection.Missing.Value;

        Excel.Application xlApp = new Excel.Application();

        Excel.Workbook xlWorkBook = xlApp.Workbooks.Add(misValue);



        for (int i = 0; i < ds.Tables.Count; i++)

        {

            DataTable table = ds.Tables[i];

            Excel._Worksheet xlWorkSheet = xlWorkBook.Sheets.Count <= i

                ? (Excel._Worksheet)xlWorkBook.Sheets.Add(After: xlWorkBook.Sheets[xlWorkBook.Sheets.Count])

                : (Excel._Worksheet)xlWorkBook.Sheets[ 1]; //same sheet


            xlWorkSheet.Columns.NumberFormat = "@";

            AddDataToWorksheet(xlWorkSheet, table);

            xlWorkSheet.Columns.AutoFit();

            xlWorkSheet.Rows.AutoFit();

            Marshal.ReleaseComObject(xlWorkSheet);

        }

        xlWorkBook.SaveAs(excelPath);

        xlWorkBook.Close();

        xlApp.Quit();

        Marshal.ReleaseComObject(xlWorkBook);

        Marshal.ReleaseComObject(xlApp);

    }



 private static void AddDataToWorksheet(Excel._Worksheet sheet, DataTable table)

    {

        sheet.Name = "Report";

        for (int i = 0; i < table.Columns.Count; i++)

        {

            sheet.Cells[1, i + 1] = table.Columns[i].ColumnName;

        }

        for (int i = 0; i < table.Rows.Count; i++)

        {

            int rowNumber = i + 2;

            DataRow row = table.Rows[i];

            for (int j = 0; j < table.Columns.Count; j++)

            {

                sheet.Cells[rowNumber, j + 1] = Convert.ToString(row[j]);

            }

        }

    }