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String.LastIndexOfAny Method (Char[], Int32)

Reports the zero-based index position of the last occurrence in this instance of one or more characters specified in a Unicode array. The search starts at a specified character position and proceeds backward toward the beginning of the string.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)
member LastIndexOfAny : 
        anyOf:char[] * 
        startIndex:int -> int

Parameters

anyOf
Type: System.Char[]

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

startIndex
Type: System.Int32

The search starting position. The search proceeds from startIndex toward the beginning of this instance.

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 or if the current instance equals String.Empty.
ExceptionCondition
ArgumentNullException

anyOf is a null reference (Nothing in Visual Basic).

ArgumentOutOfRangeException

The current instance does not equal String.Empty, and startIndex specifies a position that is not within this instance.

Index numbering starts from zero.

This method begins searching at the startIndex 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 a substring of another string.

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

.NET Framework

Supported in: 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone 8, Silverlight 8.1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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