Is HttpClient safe to use concurrently?
Here is another article from Henrik F. Nielsen about HttpClient where he says:
"The default HttpClient is the simplest way in which you can start sending requests. A single HttpClient can be used to send as many HTTP requests as you want concurrently so in many scenarios you can just create one HttpClient and then use that for all your requests."
According to Microsoft Docs, since .NET 4.5 The following instance methods are thread safe (thanks @ischell):
CancelPendingRequests
DeleteAsync
GetAsync
GetByteArrayAsync
GetStreamAsync
GetStringAsync
PostAsync
PutAsync
SendAsync
PatchAsync
Found one MSDN forum post by Henrik F. Nielsen (one of HttpClient's principal Architects).
Quick summary:
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If you have requests that are related (or won't step on eachother) then using the same HttpClient makes a lot of sense.
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In genral I would recommend reusing HttpClient instances as much as possible.