Exception "System.NullReferenceException" in SerializerHelper

[alexteodorovich]

I got this exception, stack trace:

System.NullReferenceException: Object reference not set to an instance of an object.
at SoapCore.Serializer.SerializerHelper.DeserializeInputParameter(XmlDictionaryReader xmlReader, Type parameterType, String parameterName, String parameterNs, ICustomAttributeProvider customAttributeProvider, IEnumerable`1 knownTypes) in /_/src/SoapCore/Serializer/SerializerHelper.cs:line 33
at SoapCore.SoapEndpointMiddleware`1.ProcessMessage(Message requestMessage, SoapMessageEncoder messageEncoder, IAsyncMessageFilter[] asyncMessageFilters, HttpContext httpContext, IServiceProvider serviceProvider) in /_/src/SoapCore/SoapEndpointMiddleware.cs:line 489
at SoapCore.SoapEndpointMiddleware`1.ProcessOperation(HttpContext httpContext, IServiceProvider serviceProvider) in /_/src/SoapCore/SoapEndpointMiddleware.cs:line 307

Version: 1.2.1.11

[alexteodorovich]

I think I got it - this happens when an incorrectly formed (or completely absent) SOAP-wrapper arrives.

[andersjonsson]

Great. Would it be possible for you to submit a PR with a fix and a testcase?
I'm not sure that it's a good idea to support missing soap-wrapper, but we should at least handle it gracefully