我在哪里可以找到.NET v1.0.5000.0？

I've just been informed at my workplace that we have an application that is used in production that has stopped working. I'm searching as best I can to find where the source for the application is in our source control but without much luck. I'm really hoping that this isn't an application that was developed on a local machine and never checked into source control.I've just been informed at my workplace that we