Simple solution for Crystal Report SP12 with Visual Studio 2013 on 64 bit OS

First of all, many many thanks to Don Williams (http://scn.sap.com/people/don.williams)

Issue: 

An unhandled exception of type 'System.IO.FileNotFoundException' occurred in mscorlib.dll

Additional information: Could not load file or assembly 'file:///C:\Program Files (x86)\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.

Solution: 

Simply add useLegacyV2RuntimeActivationPolicy="true" in startup tag in app.config file.

example: <startup useLegacyV2RuntimeActivationPolicy="true">