ROSLYN.PERFORMANCE.CA1827 : Do not use Count() or LongCount() when Any() can be used (C#)

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ROSLYN.PERFORMANCE.CA1827 : Do not use Count() or LongCount() when Any() can be used (C#)

Summary

For non-empty collections, Count() and LongCount() enumerate the entire sequence, while Any() stops at the first item or the first item that satisfies a condition.

This check corresponds to Roslyn rule CA1827. For full rule details, see the Microsoft website: CA1827.

Properties

Class Name	Do not use Count() or LongCount() when Any() can be used (C#)
Significance	reliability
Mnemonic	ROSLYN.PERFORMANCE.CA1827
Categories	None
Availability	Available for C# only.
Enabling	Checks for this warning class are enabled by default. To disable them, add the following WARNING_FILTER rule to the project configuration file. WARNING_FILTER += discard class="Do not use Count() or LongCount() when Any() can be used (C#)"

Relevant Configuration File Parameters

The following configuration file parameters affect checks for this warning class.