System.Net.Http.HttpClient' does not contain a definition for 'PostAsJsonAsync

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Error: 'System.Net.Http.HttpClient' does not contain a definition for 'PostAsJsonAsync' and no extension method 'PostAsJsonAsync' accepting a first argument of type 'System.Net.Http.HttpClient' could be found

Solution: 
You need to add a reference to
System.Net.Http.Formatting.dll
This can be found in the extensions assemblies area.
A good way of achieving this is by adding the NuGet package System.Net.Http.Formatting.Extension to your project.


Faced this problem in QFLES

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