Specifically the error occurs in the
Error 2 The namespace 'ModulusFE' already contains a definition for 'StockChartX' Resources.Designer.cs 11 21 ModulusFE.StockChartX
// This code was generated by a tool.
// Runtime Version:4.0.30319.225
// Changes to this file may cause incorrect behavior and will be lost if
// the code is regenerated.
I had this happen to me about a year ago and I don't remember exactly what the root cause was, but there are two things you might try:
Show All Filesin the Solution Explorer or open the solution folder in Windows Explorer - it could be that a version of the file somehow got excluded from the project and is therefor 'invisible' to VS but still makes it angry...