internal static int LastIndexOfStringOrdinalIgnoreCase(String source, String value, int startIndex, int count)
{
if (count > source.Length || count < 0 || startIndex < 0 || startIndex > source.Length - 1 || (startIndex - count + 1 < 0))
{
return(-1);
}
return(CompareInfo.LastIndexOfOrdinal(source, value, startIndex, count, ignoreCase: true));
}