Const string referencing another const string - how to avoid DRY without readonly

Question

public static class Abc
{
    public const string Placeholder = "{$content}";
    public const string Pattern = $"<div class=\"embed-responsive\">{Placeholder}</div>";
}

How to correctly solve this to avoid breaching DRY (Dont repeat yourself)? I know I can use static readonly, but then it is a bit of a different thing (even though it works..). I think there should be better way? Or is there really not?

@Dr.Fre: For explanation on differences between const and readonly please see http://stackoverflow.com/questions/55984/what-is-the-difference-between-const-and-readonly?rq=1 — NeverStopLearning, Dec 10 '16 at 11:29

Uranus · Accepted Answer · 2016-12-09T19:55:44.663

3

While you cannot call a method to initialize a constant value, it is allowed to use operators. If you need to create a constant that contains another constant value, use the plus operator to concatenate string values.

public static class Abc
{
    public const string Placeholder = "{$content}";
    public const string Pattern = "<div class=\"embed-responsive\">" + Placeholder + "</div>";
}

edited Dec 09 '16 at 19:55

answered Dec 09 '16 at 19:17

Uranus

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Const string referencing another const string - how to avoid DRY without readonly

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