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.

Namespace:   System
Assembly:  mscorlib (in mscorlib.dll)

member LastIndexOfAny : 
        anyOf:char[] -> int

Parameters

anyOf
Type: System.Char[]

A Unicode character array containing one or more characters to seek.

Return Value

Type: 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.

Exception Condition
ArgumentNullException

anyOf is null.

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.

The following example finds the index of the last occurrence of any character in the string "is" within another string.

No code example is currently available or this language may not be supported.

Universal Windows Platform
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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