C# - Change Default Of A Struct?

Question

Asked simple: Can I change the default of a struct ?

• If yes, how ?
• if no, is there an elegant way achieving the behaviour below ?

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Point or PointF return x = 0 and y = 0 but I would like to make it return x = -1 and y = -1. Reason:

• x = 0 and y = 0 is in my application a valid value
• x = -1 and y = -1 is in my application an invalid value

I would like to return just an invalid value when I can't compute a valid one. I could define a const but that would be a few in all classes that are involved in calculation of Points.

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Answer: No.

Suggested solutions:

• struct → class and init values with -1, instead of default() use new TheClass()

Answer 1

Structs cannot override the parameterless default constructor, nor can they explicitly initialize their fields.

What you could do is use nullable points Point? and use null for invalid values.