performing-culture-insensitive-string-operations-in-arrays.md

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Performing Culture-Insensitive String Operations in Arrays		03/30/2017	.net			dotnet-standard		article	culture-insensitive string operations, in arrays arrays [.NET Framework], culture-insensitive string operations comparer parameter	f12922e1-6234-4165-8896-63f0653ab478	13	rpetrusha	ronpet	wpickett

Performing Culture-Insensitive String Operations in Arrays

Overloads of the xref:System.Array.Sort%2A?displayProperty=nameWithType and xref:System.Array.BinarySearch%2A?displayProperty=nameWithType methods perform culture-sensitive sorts by default using the xref:System.Threading.Thread.CurrentCulture%2A?displayProperty=nameWithType property. Culture-sensitive results returned by these methods can vary by culture due to differences in sort orders. To eliminate culture-sensitive behavior, use one of the overloads of this method that accepts a comparer parameter. The comparer parameter specifies the xref:System.Collections.IComparer implementation to use when comparing elements in the array. For the parameter, specify a custom invariant comparer class that uses xref:System.Globalization.CultureInfo.InvariantCulture%2A?displayProperty=nameWithType. An example of a custom invariant comparer class is provided in the "Using the SortedList Class" subtopic of the Performing Culture-Insensitive String Operations in Collections topic.

Note Passing CultureInfo.InvariantCulture to a comparison method does perform a culture-insensitive comparison. However, it does not cause a non-linguistic comparison, for example, for file paths, registry keys, and environment variables. Neither does it support security decisions based on the comparison result. For a non-linguistic comparison or support for result-based security decisions, the application should use a comparison method that accepts a xref:System.StringComparison value. The application should then pass xref:System.StringComparison.Ordinal.

See Also

xref:System.Array.Sort%2A?displayProperty=nameWithType
xref:System.Array.BinarySearch%2A?displayProperty=nameWithType
xref:System.Collections.IComparer
Performing Culture-Insensitive String Operations