WCF mark all value type data members as required

Question

I'm in the context of a WCF service. I am trying to validate that my client sends me a valid contract.

In my company we have hundreds of data contracts. For us it makes sense that all value types, with the exception of Nullable<T>, should by definition be required to exist in the request message (otherwise we would want to explicitly wrap them in Nullable<T>).

I know I can mark my data members as required so:

[DataMember(IsRequired = true)]

But for value-types I would like to find a way to define it globally for the service instead of per data member. What would be the right WCF extensibility point to use in order to achieve that?

Additional info:

I've come across IDispatchMessageInspector and IDispatchMessageFormatter, but those would only let me process the entire message. Is there a better extensibility point where properties are already mapped by name to a target data member, but not yet instantiated into a .NET type? Or better yet, where I have access to serialization metadata of a single data member?

For reference as to what I'm hoping to find, when I applied a similar solution to our WebAPI which is based on JsonSerializer, I had a hook into the global configuration which allowed me to define my ContractResolver. So I derived from DefaultContractResolver and overrode:

protected override JsonProperty CreateProperty(MemberInfo member, MemberSerialization memberSerialization) {
  var property = base.CreateProperty(member, memberSerialization);

  if (IsNotNullableValueType(member)) {
    property.Required = Required.Always;
  }

  return property;
}