While syncing the TDS Project in Visual Studio, you might get the following error even after you
installed TDS Version.
Connection Test Start: 2019-12-12 01:40:51
Connection Test Pass: Content downloaded from http://testscDev//sitecore
Connection Test Pass: Sitecore TDS connection test successful
Connection Test Message: Connector version local 6.0.0.8 and msbuild 5.8.0.6
Connection Test Failure: Sitecore TDS Service DLL \HedgehogDevelopment\SitecoreProject\v9.0\bin\HedgehogDevelopment.SitecoreProject.Service.dll does not match the VisualStudio Sitecore TDS addin version.
Connection Test Finish: 2019-12-12 01:40:55
Solution:
Copy all files from 'C:\Program Files (x86)\MSBuild\HedgehogDevelopment\SitecoreProject\v9.0' and paste them into your code base path where you checkout your source code e.g. {code_base_path}/packages/HedgehogDevelopment.TDS.6.0.0.8\build.
This should resolve your problem.