I have several projects in my VS solution. Whenever I add \"System.Net.Http\" NuGet package to one it shows as version 4.2.0.0. Then I do the same and add same NuGet Package
This tends to happen when you have a reference to the framework System.Net.Http, but one of your package references requires the NuGet package System.Net.Http.
See if you have a reference to that assembly, remove it and install the NuGet package instead