When trying to create a new sheet with the C# SDK I get an error "Smartsheet.Api.Internal.Http.HttpClientException 'There was an issue connecting"
This is an Asp.net application in Visual Studio 2019 using IIS Express.
It worked fine when writing this as a windows application. Assuming it has something to do with the proxy/security settings of IIS then.
target framework is 4.6.1 Smartsheet SDK 2.6 RestSharp 106.6.9 Nlog 4.5.3 NewtonSoft 12.02