Running the Bing SDK with .NET Framework it can cause the server to just disconnect the client when TLS 1.2 has not been forced since the Bing service requires this.

It would be good to either force this or to document it to assist others. The line of required code is:
System.Net.ServicePointManager.SecurityProtocol = System.Net.SecurityProtocolType.Tls12;

I feel I must be missing something obvious here. I've been trying to follow the instructions at https://docs.microsoft.com/en-us/bing/search-apis/bing-visual-search/quickstarts/sdk/visual-search-client-library-csharp. I created a "Bing Search" service in Azure with the S9 tier which supports Visual Search. I went to the Keys and Endpoint section and copied the Key 1 out and put it in the below code, yet every time I run it I get Unauthorized:

{"code":"401","message": "Access denied due to invalid subscription key or wrong API endpoint. Make sure to provide a valid key for an active subscription and use a correct regional API endpoint for your resource."}

var client = new VisualSearchClient(new Microsoft.Azure.CognitiveServices.Search.VisualSearch.ApiKeyServiceClientCredentials("<key>"));

ImageInfo ImageInfo = new ImageInfo(url: "https://media.vanityfair.com/photos/5d9f5be40fa2040008f28470/4:3/w_1776,h_1332,c_limit/always-sunny-in-philadelphia-hangs-in-there.jpg");
VisualSearchRequest VisualSearchRequest = new VisualSearchRequest(imageInfo: ImageInfo);

var result = await client.Images.VisualSearchMethodAsync(knowledgeRequest: JsonConvert.SerializeObject(VisualSearchRequest));

The instructions don't say anything about setting an endpoint, but I tried that too, setting the Endpoint property from the one in my Keys and Endpoint page:

client.Endpoint = "https://api.bing.microsoft.com/";

But that just result in a NotFound error.

I was able to get it working by calling the REST api directly, so I know the key isn't the issue. For now I'm calling the REST API but it's a pretty kludgy API to call so I'd much prefer to use the SDK, especially since I can't get the REST code working when uploading an image instead of providing a URL: https://github.com/microsoft/bing-search-dotnet-samples/issues/4

Anyone have any idea what's going on? I tried both keys with no success. Here's a LINQPad repro of the issue: http://share.linqpad.net/c3p8vo.linq

I've been trying to use the VisualSearch sdk and struggling with it. After figuring out this issue #7 I'm now unable to provide the image as a stream instead of a URL:

This works, returning a few of the actors in the image:

var client = new VisualSearchClient(new ApiKeyServiceClientCredentials(Util.GetPassword("BingVisualSearchKey")));

string imageUrl = "https://roost.nbcuni.com/bin/viewasset.html/content/dam/Peacock/Landing-Pages/library/theoffice/mainpage/2-0-design-updates/the-office-main-hero-d.jpg/_jcr_content/renditions/original.JPEG?downsize=3840:*&output-quality=75";

var ImageInfo = new Microsoft.Bing.VisualSearch.Models.ImageInfo(url: imageUrl);
VisualSearchRequest visualSearchRequest = new VisualSearchRequest(imageInfo: ImageInfo);
var result = await client.Images.VisualSearchMethodAsync(knowledgeRequest: JsonConvert.SerializeObject(visualSearchRequest));

But this just returns a mostly empty ImageKnowledge object, no matter which image I provide:

using var stream = File.OpenRead("image.jpg");
var result = await client.Images.VisualSearchMethodAsync(image: stream, knowledgeRequest:(string)null);

I suspect there's a bug in the SDK, as I'm basically following the documentation here exactly https://docs.microsoft.com/en-us/bing/search-apis/bing-visual-search/quickstarts/sdk/visual-search-client-library-csharp

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Microsoft.Rest.SerializationException: Unable to deserialize the response.
 ---> Newtonsoft.Json.JsonReaderException: JSON integer 3041937658 is too large or small for an Int32. Path 'videos.value[0].viewCount', line 1, position 27297.
   at Newtonsoft.Json.JsonTextReader.ParseReadNumber(ReadType readType, Char firstChar, Int32 initialPosition)
   at Newtonsoft.Json.JsonTextReader.ParseNumber(ReadType readType)
   at Newtonsoft.Json.JsonTextReader.ReadNumberValue(ReadType readType)
   at Newtonsoft.Json.JsonTextReader.ReadAsInt32()

When searching for "hello"