I’m trying to build a simple scheduler using Quartz.NET, but when I try to run my program it “loses” the reference and gives me 8 errors. If I re-add the reference, which never actually disappeared, the errors go away, but the program just does the same thing. I’m working on the project on a Team Server Foundation which is completely new to me. I committed the changes, but I simply can’t get the third-party references to stick.
I saved the Quartz.DLL in my project in a lib folder.
Here’s a screenshot of the errors I’m receiving.

I should also note that I’m not really super familiar with C# or Visual Studios. Any advice on how to add and manage a third-party library would be great.
I think your issue is the
using System.DateTime;aboveusing Quartz;. Try removing that to see if it fixes the issues.Also, if you are running Quartz 2.0, you need to be sure that you are targetting at least the .Net 3.5 framework, not 2.0. See the breaking changes information here.