If you find this page, you are looking for the wrong place for your hello world API example. There is a newer version of this example, here is how you find it:
Download and install the eBayDotNET40sdk817.msi file from eBay (you still need to do this if you havenβt already): https://go.developer.ebay.com/developers/ebay/documentation-tools/sdks/dotnet
Then you will have two examples of tutorials located on your hard drive: C: \ Program Files \ eBay \ eBay.NET SDK v817 Release \ Tutorials \ C #
Two tutorials: Tutorial_HelloWorld.doc, Tutorial_ConsoleAddItem.doc
I tried the add-item tutorial and it did a great job copying and pasting the code. I have not tried to welcome the world tutorial, but I see that it is an updated version and does not use eBayAPIInterfaceClient or eBayAPIInterfaceService.
As a note: COM links that you need to add to the project are located in the C: \ Program Files \ eBay folder.
Finally, if you want the code in Sebastian the wonderful answer (above) to work, then be sure to put requestURL where you create the eBayAPIInterfaceClient instance, for example:
eBayAPIInterfaceClient service = new eBayAPIInterfaceClient("eBayAPI", requestURL);
(I tried to edit his answer, but it did not work)
Good luck! :)
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