How to add a case-insensitive option to Array.IndexOf

Question

Beaware !! The Answer marked might have some problem , like

string array[] = {"hello", "hi", "bye" , "welcome" , "hell"}

if you use the same method as described in the answer to find the index of word "hell"

Int Indexofary = Array.FindIndex(array, t => t.IndexOf("hell", StringComparison.InvariantCultureIgnoreCase) >=0);

you will get result Indexofary = 0 instead of 4.

Instead of that use

Array.FindIndex(array, t => t.Equals("hell", StringComparison.InvariantCultureIgnoreCase));

to get proper result .

Rrgards Bits

Since you are looking for index. Try this way.

Array.FindIndex(myarr, t => t.IndexOf(str, StringComparison.InvariantCultureIgnoreCase) >=0);

Array.IndexOf calls the default "Equals" method which is case-sensitive. Try this:

Array.FindIndex(myarr, t => t.Equals(str, StringComparison.InvariantCultureIgnoreCase))

var result = myarr.FindIndex(s => s.Equals(str, StringComparison.OrdinalIgnoreCase));