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">

Use Crystal Report SP12 for Visual Studio 2013, SP11 has regression issues

SAP has announced through their website regarding the regression issues in SP11.

SP9 or higher is required to integrate "SAP Crystal Reports development version" for Visual Studio 2013

download link: Crystal Report (version SP12) for Visual Studio 2013