If your web application runs in an IIS Application Pool with Enable 32-Bit Applications set to True , you must install the 32-bit runtime , even on a 64-bit Windows Server.
Are you looking to this into a new Visual Studio project, or are you deploying it to a client machine? sap crystal reports 13035 runtime 64bit download link
Follow these steps to deploy the 64-bit runtime successfully onto your server or workstation. Step 1: Pre-installation Prerequisites If your web application runs in an IIS