Question

Somehow I can’t seem to get string replacement within a foreach loop in C# to work. My code is as follows :

foreach (string s in names)
{
    s.Replace("pdf", "txt");
}

Am still quite new to LINQ so pardon me if this sounds amateurish 😉

Answer 1

You say you’re after a LINQ solution… that’s easy:

var replacedNames = names.Select(x => x.Replace("pdf", "txt"));

We don’t know the type of names, but if you want to assign back to it you could potentially use ToArray or ToList:

// If names is a List<T>
names = names.Select(x => x.Replace("pdf", "txt")).ToList();
// If names is an array
names = names.Select(x => x.Replace("pdf", "txt")).ToArray();

You should be aware that the code that you’ve posted isn’t using LINQ at all at the moment though…