Error1 Namespace '' contains a definition conflicting with alias 'Excel'

Question

_{Thursday, July 24, 2008 7:44 PM}

I am trying to transfer data to an excel workbook . I have added the adodb and the MicrosoftExcel12ObjectLibrary into the com references. I am still getting this error. My code is as follows:

using System;
using System.Collections.Generic;
using System.Text;
using System.ComponentModel;
using System.Data;
using Excel = Microsoft.Office.Interop.Excel;
using System.Reflection;

namespace iExcelClass
{
    class iExcel
    {
        public Excel.Application _mExcelApp;
        private Excel.Workbook _mWorkbook;
        private Excel.Worksheet _mWorkSheet;
        private int _mSheet1Row = 1;
        private int _mSheet2Row = 1;
        private int _mExcelPID = 0;
        private bool _mblnExcelVisible = false;
        private string _mstrXLSFileFullName = "";
        private string _mstrWorkSheetName = "MyWkShtName";

The errors are on the underlined parts. The zigzag blue line is under Excel in all three lines. Any help would be really appreciated.

Thanks!

All replies (4)

_{Thursday, July 24, 2008 7:59 PM ✅Answered | 1 vote}

I've never seen the error before, but it sounds like there is already an alias called "Excel". Try changing your alies to another name like:

using MyExcel = Microsoft.Office.Interop.Excel;

private MyExcel.Application...

See if that helps.

_{Thursday, July 24, 2008 8:26 PM}

Why do you even have the Excel = Microsoft.Office.Interop.Excel? If you have the using reference you should be able to refer to those objects just as Application, Workbook and Worksheet without needing the Excel. part

_{Saturday, October 12, 2013 8:17 AM}

"using Excel = Microsoft.Office.Interop.Excel;"

use different name instead of "Excel". example: "Excela", "MyExcel"..

_{Monday, December 30, 2013 9:00 AM}

I got the same error after I added as a reference not only 

using Excel = Microsoft.Office.Interop.Excel; 

but also Microsoft Office 9.0 Object Library. Once I deleted this reference, I could compile the code.