Method ExtString.FindLastNot

Overload

Finds the last character not specified in chars (searches right to left). Returns its index, or -1 if not found.

public static int FindLastNot(this string t, string chars, Range? range = null)

t (string)

This string.

chars (string)

Characters.

range (Range?)

The search range.

int

chars is null.

Invalid range.