The Microsoft chart control is included in .NET 4 and above. For .NET3.5 your application distribution package needs to include mschart.exe and install it as a prerequisite if it is not already on the users PC. You can’t simply include a .dll – mschart.exe needs to be run.
Adding MS Chart Controls as a prerequisite in your Visual Studio 2008 installation package
Follow this guide, then in the setup and deployment project select Menu > Project > Properties and select it as a prequisite:
Another guide if the above ever vanishes: