Installing a Visual Studio Extension
问题 I've just started using VS2015 and I'm having trouble doing something that should be simple... install the Side Waffle extension. From their website I downloaded the .vsix file, templatepack.vsix. When I double click on it, I get an message, "The extension manifest is invalid." So I went into Visual Studio 2015, went to Tools > Extensions and Updates, and found it under 'Online'. But the only option is to download it. There is no "Install" option. I went back to the download folder, and on