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We've got some JSON that we are deserializing into a strongly-typed object graph in C#. However, we've got one issue: sometimes there is an "empty" value in the JSON (e.g., empty string) in a property that maps to a boolean value in our model. In our case, we know that 100% of the time, we can translate these "blank" values to Boolean false . However, the JSON deserializers I've tried don't know about this (understandably). I've been trying to find a way to intercept the deserialization of each property, and optionally override the output. I.e., if there was an "interceptor" method I could register, that looked like this: public Boolean JsonDeserializationInterceptor(String rawJson, System.Type targetType, out object result) { Boolean overrodeValue = false; result = null; if(targetType == typeof(System.Boolean)) { overrodeValue = true; // We'll pretend that we're interpreting the string "Yes" as // true, and all other values are false. if (rawJson != null && rawJson.ToLower() == "\"yes\"") result = true; else result = false; } return overrodeValue; } That's just hypothetical, of course, but hopefully it gives you an idea of what I'm trying to accomplish. In my research I have not been able to figure out a way to do this. I've looked at Json.NET , System.Runtime.Serialization.Json.DataContractJsonSerializer , and System.Web.Script.Serialization.JavaScriptSerializer . I bet there is a way to do this, and I just haven't been able to figure it

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