String.LastIndexOfAny Method (Char)
Reports the zero-based index position of the last occurrence in this instance of one or more characters specified in a Unicode array.
Assembly: mscorlib (in mscorlib.dll)
A Unicode character array containing one or more characters to seek.
Return ValueType: System.Int32
The index position of the last occurrence in this instance where any character in anyOf was found; -1 if no character in anyOf was found.
Index numbering starts from zero.
This method begins searching at the last character position of this instance and proceeds backward toward the beginning until either a character in anyOf is found or the first character position has been examined. The search is case-sensitive.
This method performs an ordinal (culture-insensitive) search, where a character is considered equivalent to another character only if their Unicode scalar values are the same. To perform a culture-sensitive search, use the CompareInfo.LastIndexOf method, where a Unicode scalar value representing a precomposed character, such as the ligature "Æ" (U+00C6), might be considered equivalent to any occurrence of the character's components in the correct sequence, such as "AE" (U+0041, U+0045), depending on the culture.
Available since 8
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Available since 8.1