Thank you for you answered, I try your suggest but I had the same problem, read some section and add the following to my application, csproj after the tag </Project> :
<Target Name="_RemoveMdbFiles" BeforeTargets="_Upload">
<ItemGroup>
<_Temp Include="%(_ResolvedSymbols.Identity)" Condition="'%(_ResolvedSymbols.Extension)' == '.mdb'" />
<_ResolvedSymbols Remove="@(_Temp)"/>
</ItemGroup>
</Target>
This now worked for me. Thank you very much.