This Fiddler extension generates C# (.Net Framework 4.5) HttpClient code.

Fiddler 4.0

• Copy HttpClientCode.dll from the bin folder to your %USERPROFILE%\Documents\Fiddler2\Scripts folder.
• You'll need to restart Fiddler if it's already running.

Select the request
Select Http Client Code from context menu Httpclientcode

Click Generate Code Here you can see sample GET from rest service arcgis Httpclientcodeform

If you need headers you can checked Add headers

Httpclientcodeformheaders

Here you can see sample POST from rest service arcgis

Httpclientcodeformpost

Click button Copy to Clipboard

Paste from Clipboard and test with LinqPad

Httpclientcodelinqpad