Could not load file or assembly 'file:///C:\Program Files\SAP BusinessObjects\Crystal Reports for .NET Framework 4.0\Common\SAP BusinessObjects Enterprise XI 4.0\win32_x86\dotnet1\crdb_adoplus.dll' or one of its dependencies. The system cannot find the file specified.

changing in app.config
 
from:
 
<!--<startup>
  <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/></startup>-->
 
to:
 
<startup useLegacyV2RuntimeActivationPolicy="true">
 
    <supportedRuntime version="v4.0"/>
 
  </startup>