Rebooting didn't work for me, so I'd like to share what did work.
First, I just upgraded to Windows 8. This problem didn't occur before then. And this issue only happened in one of my app.config files. So I decided to compare the problematic app.config with a good one. In Visual Studio, with the app.config open, I went to Xml -> Schemas
. I noticed that the good config only had three of these schemas checked. The bad one had the same three checked, plus a DotNetConfig.xsd. After I changed the Use
column to automatic, for DotNetConfig.xsd, the problem went away.
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…