error RG1000: Unknown build error
问题 C:\Program Files\MSBuild\Microsoft\Silverlight for Phone\v4.0\Microsoft.Silverlight.Common.targets(625,5): error RG1000: Unknown build error, 'An item with the same key has already been added.' Done building project "FileName.csproj" -- FAILED. Build failed. Receive this error whenever i try building the soln. 回答1: We ran into the same problem yesterday. It happened after we merged two branches in our TFS, so we looked into the project file. There was twice the same image added to the project