Question

I’m creating a simple C# application where in it has a condition to capture both uppercase and lowercase of a letter.

This is my condition:

if( txtChord.Text == "A" || txtChord.Text == "a" && cbKeys.SelectedIndex == 6 ){
                txtAnswer.Text = "B";
            }

I’d like to do this more efficiently using regex.

Answer 1

Use String.Compare(String, String, Boolean) method and supply true to the last argument to ignore case.

The method above returns negative, 0 or positive number.

If you only want bool value, you can use String.Equals(String, String, StringComparison) with StringComparison.OrdinalIgnoreCase option.