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https://issues.apache.org/jira/browse/TINKERPOP-1952?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16453726#comment-16453726
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Florian Hockmann commented on TINKERPOP-1952:
---------------------------------------------

And you're getting that for every {{graphStatement}}? Even for trivial ones 
like {{1+1}}?

The inner {{WebSocketException}} sounds more like a problem specific to 
CosmosDB to me. Could you try reproducing the issue just with the Gremlin 
Server?

> using Gremlin.Net in .NET Framework 4.71 console app causes "Could not load 
> file or assembly 'System.Reflection.TypeExtensions, Version=4.0.0.0..."
> ---------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: TINKERPOP-1952
>                 URL: https://issues.apache.org/jira/browse/TINKERPOP-1952
>             Project: TinkerPop
>          Issue Type: Bug
>          Components: dotnet
>    Affects Versions: 3.3.2
>         Environment: Windows Server 2016 1607
>            Reporter: Kai Walter
>            Priority: Major
>
> I wanted to use Gremlin.Net in Azure Functions and stumbled over [this 
> problem|https://stackoverflow.com/questions/49923888/could-not-load-file-or-assembly-system-reflection-typeextensions-version-4-0-0].
> When downloading and running the sample
> https://github.com/Azure-Samples/azure-cosmos-db-graph-gremlindotnet-getting-started
>  on my machine I run into this error:
> System.AggregateException
>   HResult=0x80131500
>   Message=One or more errors occurred.
>   Source=mscorlib
>   StackTrace:
>    at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean 
> includeTaskCanceledExceptions)
>    at System.Threading.Tasks.Task.Wait(Int32 millisecondsTimeout, 
> CancellationToken cancellationToken)
>    at System.Threading.Tasks.Task.Wait()
>    at GremlinNetSample.Program.Main(String[] args) in 
> C:\Users\Y1WLE\src\Microsoft\azure-cosmos-db-graph-gremlindotnet-getting-started\GremlinNetSample\Program.cs:line
>  65
> Inner Exception 1:
> {color:red}*WebSocketException: The server returned status code '200' when 
> status code '101' was expected.*{color}
>  
>  



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