DocumentBuilder crashes when building Arrays

[shuebner]

Method DocumentBuilder.Build(IEnumerable<IIdentifiable> entities):

When entities is an Array (and thus not a generic type) .GenericTypeArguments[0] crashes with IndexOutOfRangeException.

Does anything speak against the following simple fix?

var entitiesType = entities.GetType();
var entityType = entitiesType.IsArray ? entitiesType.GetElementType() : entitiesType.GenericTypeArguments[0];

[jaredcnance]

That sounds reasonable to me. Would you like to open a PR?

[shuebner]

The same thing happens in GetRelationships. I will make another pull request.