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StringComparison Enumeration

July 28, 2014

Specifies the culture, case, and sort rules to be used by certain overloads of the String.Compare and String.Equals methods.

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

public enum StringComparison

Member nameDescription
CurrentCultureCompare strings using culture-sensitive sort rules and the current culture.
CurrentCultureIgnoreCaseCompare strings using culture-sensitive sort rules, the current culture, and ignoring the case of the strings being compared.
InvariantCultureCompare strings using culture-sensitive sort rules and the invariant culture.
InvariantCultureIgnoreCaseCompare strings using culture-sensitive sort rules, the invariant culture, and ignoring the case of the strings being compared.
OrdinalCompare strings using ordinal sort rules.
OrdinalIgnoreCaseCompare strings using ordinal sort rules and ignoring the case of the strings being compared.

The StringComparison enumeration is used to specify whether a string comparison should use the current culture or the invariant culture, word or ordinal sort rules, and be case-sensitive or case-insensitive.

An operation that uses word sort rules performs a culture-sensitive comparison wherein certain nonalphanumeric Unicode characters might have special weights assigned to them. Using word sort rules and the conventions of a specific culture, the hyphen ("-") might have a very small weight assigned to it so that "coop" and "co-op" appear next to each other in a sorted list.

An operation that uses ordinal sort rules performs a comparison based on the numeric value (Unicode code point) of each Char in the string. An ordinal comparison is fast, but culture-insensitive. Using ordinal sort rules a string that starts with some Unicode character, U+xxxx, comes before a string that starts with some Unicode character, U+yyyy, if the value of xxxx is numerically less than yyyy.

For more information about comparisons, see the System.String class remarks. For more information about culture, see the System.Globalization.CultureInfo class remarks.

Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone

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