Discussion on: Start using fields in C#. Using properties is not a good habit and won't do you any good...

[Nicolas Hervé]

In your example you use default property setter and getter but you can define your own property accessors for this purpose which is much cleaner.

public class Address
{
    private string _zipCode;

    public string ZipCode
    {
        get => _zipCode;
        set
        {
            // validation
            if (string.IsNullOrEmpty(value))
            {
                throw new Exception("Invalid zip code");
            }
            _zipCode = value;
        }
    }
}

docs.microsoft.com/en-us/dotnet/cs...

[Łukasz Reszke]

Hey Nicolas, you're totally right.
That's another way to do it :) Thanks for sharing!

[Nicolas Hervé]

It is the idiomatic way to do it.