I'm a newbie in C# and was endorsed with an app with no documentation or anything. I was wondering if there is a way I can test a WSDL API from a custom built C# services? I just want to make sure that the API is working and that the app was not the one causing troubles. I tried postman but it returns me this whenever I tried to access the API.
I was hoping someone can help me with this. I tried several tutorials online and it doesn't work. Thank you
