Build error with latest git

To fix it I tried compile1.jpg for every project that had errors and it fixed most of them, but I'm still left with 3 errors.

MissionPlanner.Stats, StatsPlugin.cs, ln 6,7,8

I also did a clean install of latest MissionPlanner that the reference path in VS is pointing to, and a clean checkout of the code.

Start with a clean checkout and reproduce the build in Visual Studio, capturing the three remaining errors. Inspect StatsPlugin.cs at lines 6–8 and the MissionPlanner.Stats project reference; done means the project builds without those errors.

Written by the indexing model from the issue text.