code.cs

curl -i -X POST "https://robsformrecognizerresource.cognitiveservices.azure.com/formrecognizer/v2.0-preview/prebuilt/receipt/analyze" -H "Content-Type: application/json" -H "Ocp-Apim-Subscription-Key: 502a443d06...d409a5081b587c8d68b" --data-ascii "{ \"url\": \"https://formrecgonizerstorage.blob.core.windows.net/forms/receipt_1_rotated.png\"}"


async static Task RunReceipt()
		{
			var receiptUrl = "https://formrecgonizerstorage.blob.core.windows.net/forms/receipt_1_rotated.png";
			var uri = "https://robsformrecognizerresource.cognitiveservices.azure.com/formrecognizer/v2.0-preview/prebuilt/receipt/analyze";
			object body = new { url = receiptUrl };
			var requestBody = JsonConvert.SerializeObject(body);
      
      //body:   {"url":"https://formrecgonizerstorage.blob.core.windows.net/forms/receipt_1_rotated.png"}

			Console.WriteLine(requestBody);
			using (var client = new HttpClient())
			using (var request = new HttpRequestMessage())
			{
				request.Method = HttpMethod.Post;
				request.RequestUri = new Uri(uri);
				request.Content = new StringContent(requestBody, Encoding.UTF8, "application/json");
				request.Headers.Add("Ocp-Apim-Subscription-Key", "502a......4d409a5081b587c8d68b");

				var response = await client.SendAsync(request);
				var responseBody = await response.Content.ReadAsStringAsync();

				dynamic data = JsonConvert.DeserializeObject(responseBody);
				Console.WriteLine(responseBody);
			}
		}
    
    
    //output: {"error":{"code":"InvalidImageURL","innerError":{"requestId":"890a4ee3-a2b9-4c12-9b1d-baa5042a076f"},"message":"Image URL is badly formatted."}}