Question

I have an object like this:

class MyObject
{
    public string Object.Prop1 { get; set; }
    public string Object.Prop2 { get; set; }
}

I’m writing a custom JSON converter and I’m serializing this object like this:

Dictionary<string, object> OutputJson = new Dictionary<string, object>();

OutputJson.Add("TheProp1", MyObject.Prop1.Trim());

If for some reason Prop1 is null, will the code encode TheProp1 as "" or will it crash?

Answer 1

If Prop1 is null your code will throw a NullReferenceException. You need to test if Prop1 is null before calling Trim:

MyObject.Prop1 == null ? "" : MyObject.Prop1.Trim()

Or you can do it more concisely with the null-coalescing operator:

(MyObject.Prop1 ?? "").Trim()