Dotnet Run, dotnet build runs for a long time

Suddenly found that VS2017.15.4.5 open the project is particularly slow, and build the project will have to wait for a long time,

Always thought to be the problem of the VS update, a half-day discovery is the project itself.

Dotnet Core Project If a folder contains a large number of files, such as Node_modules, will affect the efficiency of dotnet run,

Workaround: Add under the <PropertyGroup> node in the csproj file:

<defaultitemexcludes>$ (Defaultitemexcludes); clientapp\node_modules\**</defaultitemexcludes> which clientapp\node_modules\** this path is a directory containing a large number of files.

Dotnet Run, dotnet build runs for a long time