i have the following error as follows

Question

Microsoft.Office.Interop.Excel, Version=12.0.0.0, Culture=neutral, PublicKeyToken=71E9BCE111E9429C

when i run the project i have following error.

in that project folder and in the bin folder Microsoft.Office.Interop.Excel.dll has installed.

but even though the error occurs why.

please give the solution for the above error