DataTable property causes the error "The JSON property 'Item' is defined multiple times on type 'System.ComponentModel.ComponentCollection"

[chrisjpryor]

This occurs when there is a property of type DataTable on a response or request object.
Similar to #755

[jbirdman72]

I am running into a similar issue when generating openapi from webapi (this project is not dotnet core) and I have a DataTable on my response object.

@RicoSuter Is there any known workaround?

`
System.InvalidOperationException: Sequence contains more than one matching element

Server stack trace:
at System.Linq.Enumerable.SingleOrDefault[TSource](IEnumerable1 source, Func2 predicate)
at Namotion.Reflection.ContextualType.get_EnumerableItemType()
at NJsonSchema.Generation.JsonSchemaGenerator.GenerateArray[TSchemaType](TSchemaType schema, JsonTypeDescription typeDescription, JsonSchemaResolver
schemaResolver)
at NJsonSchema.Generation.JsonSchemaGenerator.Generate[TSchemaType](TSchemaType schema, ContextualType contextualType, JsonSchemaResolver schemaResol
ver)
at NJsonSchema.Generation.JsonSchemaGenerator.Generate[TSchemaType](ContextualType contextualType, JsonSchemaResolver schemaResolver)
at NJsonSchema.Generation.JsonSchemaGenerator.GenerateWithReferenceAndNullability[TSchemaType](ContextualType contextualType, Boolean isNullable, Jso
nSchemaResolver schemaResolver, Action2 transformation) at NJsonSchema.Generation.JsonSchemaGenerator.LoadPropertyOrField(JsonProperty jsonProperty, ContextualAccessorInfo accessorInfo, Type parentType, Js onSchema parentSchema, JsonSchemaResolver schemaResolver) at NJsonSchema.Generation.JsonSchemaGenerator.GenerateProperties(Type type, JsonSchema schema, JsonSchemaResolver schemaResolver) at NJsonSchema.Generation.JsonSchemaGenerator.GenerateInheritance(ContextualType type, JsonSchema schema, JsonSchemaResolver schemaResolver) at NJsonSchema.Generation.JsonSchemaGenerator.GenerateObject(JsonSchema schema, JsonTypeDescription typeDescription, JsonSchemaResolver schemaResolve r) at NSwag.Generation.OpenApiSchemaGenerator.GenerateObject(JsonSchema schema, JsonTypeDescription typeDescription, JsonSchemaResolver schemaResolver) at NJsonSchema.Generation.JsonSchemaGenerator.Generate[TSchemaType](TSchemaType schema, ContextualType contextualType, JsonSchemaResolver schemaResol ver) at NJsonSchema.Generation.JsonSchemaGenerator.Generate[TSchemaType](ContextualType contextualType, JsonSchemaResolver schemaResolver) at NSwag.Generation.OpenApiSchemaGenerator.GenerateObject(JsonSchema schema, JsonTypeDescription typeDescription, JsonSchemaResolver schemaResolver) at NJsonSchema.Generation.JsonSchemaGenerator.Generate[TSchemaType](TSchemaType schema, ContextualType contextualType, JsonSchemaResolver schemaResol ver) at NJsonSchema.Generation.JsonSchemaGenerator.Generate[TSchemaType](ContextualType contextualType, JsonSchemaResolver schemaResolver) at NJsonSchema.Generation.JsonSchemaGenerator.GenerateWithReferenceAndNullability[TSchemaType](ContextualType contextualType, Boolean isNullable, Jso nSchemaResolver schemaResolver, Action2 transformation)
at NJsonSchema.Generation.JsonSchemaGenerator.LoadPropertyOrField(JsonProperty jsonProperty, ContextualAccessorInfo accessorInfo, Type parentType, Js
onSchema parentSchema, JsonSchemaResolver schemaResolver)
at NJsonSchema.Generation.JsonSchemaGenerator.GenerateProperties(Type type, JsonSchema schema, JsonSchemaResolver schemaResolver)
at NJsonSchema.Generation.JsonSchemaGenerator.GenerateInheritance(ContextualType type, JsonSchema schema, JsonSchemaResolver schemaResolver)
at NJsonSchema.Generation.JsonSchemaGenerator.GenerateObject(JsonSchema schema, JsonTypeDescription typeDescription, JsonSchemaResolver schemaResolve
r)
at NSwag.Generation.OpenApiSchemaGenerator.GenerateObject(JsonSchema schema, JsonTypeDescription typeDescription, JsonSchemaResolver schemaResolver)
at NJsonSchema.Generation.JsonSchemaGenerator.Generate[TSchemaType](TSchemaType schema, ContextualType contextualType, JsonSchemaResolver schemaResol
ver)
at NJsonSchema.Generation.JsonSchemaGenerator.Generate[TSchemaType](ContextualType contextualType, JsonSchemaResolver schemaResolver)
at NSwag.Generation.OpenApiSchemaGenerator.GenerateObject(JsonSchema schema, JsonTypeDescription typeDescription, JsonSchemaResolver schemaResolver)
at NJsonSchema.Generation.JsonSchemaGenerator.Generate[TSchemaType](TSchemaType schema, ContextualType contextualType, JsonSchemaResolver schemaResol
ver)
at NJsonSchema.Generation.JsonSchemaGenerator.Generate[TSchemaType](ContextualType contextualType, JsonSchemaResolver schemaResolver)
at NJsonSchema.Generation.JsonSchemaGenerator.GenerateWithReferenceAndNullability[TSchemaType](ContextualType contextualType, Boolean isNullable, Jso
nSchemaResolver schemaResolver, Action2 transformation) at NJsonSchema.Generation.JsonSchemaGenerator.LoadPropertyOrField(JsonProperty jsonProperty, ContextualAccessorInfo accessorInfo, Type parentType, Js onSchema parentSchema, JsonSchemaResolver schemaResolver) at NJsonSchema.Generation.JsonSchemaGenerator.GenerateProperties(Type type, JsonSchema schema, JsonSchemaResolver schemaResolver) at NJsonSchema.Generation.JsonSchemaGenerator.GenerateObject(JsonSchema schema, JsonTypeDescription typeDescription, JsonSchemaResolver schemaResolve r) at NSwag.Generation.OpenApiSchemaGenerator.GenerateObject(JsonSchema schema, JsonTypeDescription typeDescription, JsonSchemaResolver schemaResolver) at NJsonSchema.Generation.JsonSchemaGenerator.Generate[TSchemaType](TSchemaType schema, ContextualType contextualType, JsonSchemaResolver schemaResol ver) at NJsonSchema.Generation.JsonSchemaGenerator.Generate[TSchemaType](ContextualType contextualType, JsonSchemaResolver schemaResolver) at NJsonSchema.Generation.JsonSchemaGenerator.GenerateWithReferenceAndNullability[TSchemaType](ContextualType contextualType, Boolean isNullable, Jso nSchemaResolver schemaResolver, Action2 transformation)
at NSwag.Generation.Processors.OperationResponseProcessorBase.LoadDefaultSuccessResponse(ParameterInfo returnParameter, String successXmlDescription,
OperationProcessorContext context)
at NSwag.Generation.Processors.OperationResponseProcessorBase.ProcessOperationDescriptions(IEnumerable1 operationDescriptions, ParameterInfo returnP arameter, OperationProcessorContext context, String successResponseDescription) at NSwag.Generation.Processors.OperationResponseProcessorBase.ProcessResponseTypeAttributes(OperationProcessorContext operationProcessorContext, IEnu merable1 responseTypeAttributes)
at NSwag.Generation.WebApi.Processors.OperationResponseProcessor.Process(OperationProcessorContext context)
at NSwag.Generation.WebApi.WebApiOpenApiDocumentGenerator.RunOperationProcessors(OpenApiDocument document, Type controllerType, MethodInfo methodInfo
, OpenApiOperationDescription operationDescription, List1 allOperations, OpenApiDocumentGenerator swaggerGenerator, OpenApiSchemaResolver schemaResolve r) at NSwag.Generation.WebApi.WebApiOpenApiDocumentGenerator.AddOperationDescriptionsToDocument(OpenApiDocument document, Type controllerType, List1 op
erations, OpenApiDocumentGenerator swaggerGenerator, OpenApiSchemaResolver schemaResolver)
at NSwag.Generation.WebApi.WebApiOpenApiDocumentGenerator.GenerateForController(OpenApiDocument document, Type controllerType, OpenApiDocumentGenerat
or swaggerGenerator, OpenApiSchemaResolver schemaResolver)
at NSwag.Generation.WebApi.WebApiOpenApiDocumentGenerator.d__7.MoveNext()
`

[EffivityPK]

@jbirdman72 Any updates regarding this?