ReadAsync<ODataServiceResult>() does not work when there are enums in the entity. You get an exception as follows:
The JSON value could not be converted to <Your Enum Type>...
Why?
Because OData Web API returns enum values as their string representations instead of numeric values.
Solution:
You need to update your code to use a JsonStringEnumConverter as follows:
var options = new JsonSerializerOptions
{
PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
PropertyNameCaseInsensitive = true,
};
options.Converters.Add(new JsonStringEnumConverter());
return stream.Length > 0 ? await JsonSerializer.DeserializeAsync<T>(stream, options) : default(T);
Or if there's a reason not to do so, then you should add a parameter to ReadAsync() of type JsonSerializerOptions, so we can control that ourselves.