Does not handle type conversion

[donald-fraser]

I am getting the following exception thrown, line 39 of DataAnnotationsValidator.cs (name space: ReHackt.Extensions.Options.Validation)

InvalidOperationException: Method may only be called on a Type for which Type.IsGenericParameter is true.
stack trace:

   at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor, Boolean wrapExceptions)
   at System.Reflection.RuntimePropertyInfo.GetValue(Object obj, BindingFlags invokeAttr, Binder binder, Object[] index, CultureInfo culture)
   at System.Reflection.RuntimePropertyInfo.GetValue(Object obj, Object[] index)
   at ReHackt.Extensions.Options.Validation.DataAnnotationsValidator.TryValidateObjectRecursive[T](T obj, List`1 results, ISet`1 validatedObjects, IDictionary`2 validationContextItems)
   at ReHackt.Extensions.Options.Validation.DataAnnotationsValidator.TryValidateObjectRecursive[T](T obj, List`1 results, ISet`1 validatedObjects, IDictionary`2 validationContextItems)
   at ReHackt.Extensions.Options.Validation.DataAnnotationsValidator.TryValidateObjectRecursive[T](T obj, List`1 results, ISet`1 validatedObjects, IDictionary`2 validationContextItems)
   at ReHackt.Extensions.Options.Validation.DataAnnotationsValidator.TryValidateObjectRecursive[T](T obj, List`1 results, IDictionary`2 validationContextItems)
   at ReHackt.Extensions.Options.Validation.DataAnnotationsValidateRecursiveOptions`1.Validate(String name, TOptions options)
   at Microsoft.Extensions.Options.OptionsFactory`1.Create(String name)

It so happens that the object it is attempting to validate uses a TypeConverter attribute. In essence the the Json looks like:

{
  "MessageBroker": {
    "MessageBusUrl": "rabbitmq://localhost:5672/",
    "Territory": "USA"
  }
}

where Territory is not a string.
The options class looks like:

public class MessageBrokerConfiguration
{
        public const string Section = "MessageBroker";

        [Uri]
        public Uri MessageBusUrl { get; set; }

        [Required]
        public TerritoryWrapper Territory { get; set; }
}

Class TerritoryWrapper has a TypeConverter attribute allowing it to be constructed from a string

[donald-fraser]

This was version 5.0.0

[LionelVallet]

Sorry but I have no time for handling such specific case. You can create a pull request with the solution or at least a unit test and I'll look at it.