Debug AnyCPU {B98616B3-F7E5-414E-9CAD-AEE0D791057B} Exe PluginDevServer PluginDevServer v4.0 512 true AnyCPU true full false bin\Debug\ DEBUG;TRACE prompt 4 AnyCPU pdbonly true bin\Release\ TRACE prompt 4 OnBuildSuccess ..\packages\WebSocketSharp.1.0.3-rc11\lib\websocket-sharp.dll This project references NuGet package(s) that are missing on this computer. Use NuGet Package Restore to download them. For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.