C# Feature � Properties with validation

Overview

Add guard clauses in setters to enforce invariants and provide useful errors.

Example

public class Person
{
    private int _age;
    public int Age
    {
        get => _age;
        set
        {
            if (value < 0 || value > 120)
                throw new ArgumentOutOfRangeException(nameof(value), "Age must be between 0 and 120.");
            _age = value;
        }
    }
}

Notes

• For cross-property validation, consider factory methods or init-only setters with constructor validation.
• For data-binding, raise INotifyPropertyChanged after successful assignment.

See also

• Init-only setters
• Required members
• Properties & Events