markzzz markzzz - 3 months ago 16
C# Question

How to return empty string if an object is null?

Here is a snippet of my code:

var link = socials.Where(p => p.type == Facebook).FirstOrDefault().URL;

the problem is that there aren't any social object in the list,
, and
trigger an exception.

How can I avoid this in "one" line with LINQ? Thus, if null return empty
(or custom even better) string, else


You can use DefaultIfEmpty with an argument to specify the fallback value:

var link = socials
    .Where(p => p.type == Facebook)
    .Select(p => p.Url)

FirstOrDefault is not necessary anymore, it is safe to use First with DefaultIfEmpty.