c# string.replace in foreach loop

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\"         


        

Answer 1

Strings in C# are immutable (does not change), so s.Replace will return a new string. Unfortunately this means you cannot use foreach to do the update. If names is an array this should work:

for(int i = 0; i < names.Length; i++)
{
    names[i] = names[i].Replace("pdf", "txt");
}