Microsoft.CSharp.RuntimeBinder.RuntimeBinderException: 'The call is ambiguous between the following methods or properties'

Question: How to you solve for "Microsoft.CSharp.RuntimeBinder.RuntimeBinderException: 'The call is ambiguous between the following methods or properties" it goes on and say "System.Text.JsonSerializer.Deserialize<MyObject>(System.IO.Stream,System.Text.Json.JsonSerializerOptions)" and "System.Text.JsonSerializer.Deserialize<MyObject>(string,System.Text.Json.JsonSerializerOption)".

I mean, isn't the Compiler Intelligent enough to know what type of parameter I just passed in?



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Answer: Take a deeper look at the parameter you are passing into the Deserialize function, the compiler is correct, it is not able to know the type of the object passed in the function right away or at least on RunTime. There is a chance you are passing in an object of type "dynamic" as you know passing in the object of type "dynamic" could not be evaluated until the object is actually available for evaluation at RunTime.

If possible stay away from passing in the Dynamic Type object into a function that gets its parameters evaluated at RunTime, this might cause errors in Production as the Type of the Object might change.

The best way to handle this scenario is by explicitly defining the Object type, yes I know some of you might be saying "Well, that means that I have to allocate memory on the Stack to store the object" but yes, that is correct.

If Memory allocation is your issue, you can not entirely run away from it, you could do something about it by using Shared ArrayPool and returning that Pool when you are done using it. Keep in mind that Array Pooling might have its own caveats, when borrowing the Array from the Pool, the Array shared might not be empty, however, you can handle this test case by checking every time you use a Shared Array from the Pool.

The error is most likely to occur if you have your code written as

MyObject obj = Json.JsonSerializer.Deserializer<MyObjectType>(_cache.getDynamicObjectFromCache);

The _cache.getDynamicObjectFromCache() returns a object of type "Dynamic" which is throwing an exception. Please leave a comment below illustrating how you solved this issue. You don't need to log in to post a comment.