Which of the following is the correct syntax to add validation logic inside a property setter in C#?

easy📝 Syntax Q3 of Q15

C Sharp (C#) - Properties and Encapsulation

Aset { if (value < 0) throw new ArgumentException(); _age = value; }

Bset => _age = value if (value >= 0);

Cset { _age = value; if (value < 0) throw new ArgumentException(); }

Dset (value) { if value < 0 throw new ArgumentException(); _age = value; }

Step-by-Step Solution

Solution:

Step 1: Check valid C# setter syntax
The setter uses curly braces and the keyword 'set' with a block.
Step 2: Validate the order of validation and assignment
Validation must happen before assigning the value to the backing field.
Final Answer:
set { if (value < 0) throw new ArgumentException(); _age = value; } -> Option A
Quick Check:
Setter syntax with validation = set { if (value < 0) throw new ArgumentException(); _age = value; } [OK]

Quick Trick: Validate before assigning in setter block [OK]

Common Mistakes:

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