creating excel file from an c# application

Question

I am trying to create an excel file form c# application.

my code is as follows,

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Excel = Microsoft.Office.Interop.Excel;


public class ExcelFileCreation
{
    Excel.Application xlApp;
    Excel.Workbook xlWorkBook;
    Excel.Worksheet xlWorkSheet;
    object misValue = System.Reflection.Missing.Value;
    ***xlApp = new Excel.ApplicationClass();***
    xlWorkBook = xlApp.Workbooks.Add(misValue);

    //and further lines of code.....
}

I am getting the following error in the highlighted line above as,

Interop type 'Microsoft.Office.Interop.Excel.ApplicationClass' cannot be embedded. Use the applicable interface instead.

please help me out of this problem!

Answer 1

Use Excel.Application instead of Excel.ApplicationClass

xlApp = new Excel.Application();

Update: You are referencing an interop assembly with "Embed Interop Types" set to true . According to this post Class types contain metadata and code, while interfaces only contain metadata. It is safe to embed metadata but not anything that can potentially contain executable code.

Answer 2

Replace

xlApp = new Excel.ApplicationClass();

with

xlApp = new Excel.Application();