ROSLYN.PERFORMANCE.CA1864 : Prefer the 'IDictionary.TryAdd(TKey, TValue)' method (C#)

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ROSLYN.PERFORMANCE.CA1864 : Prefer the 'IDictionary.TryAdd(TKey, TValue)' method (C#)

Summary

Prefer a 'TryAdd' call over an 'Add' call guarded by a 'ContainsKey' check. 'TryAdd' behaves the same as 'Add', except that when the specified key already exists, it returns 'false' instead of throwing an exception.

This check corresponds to Roslyn rule CA1864. For full rule details, see the Microsoft website: CA1864.

Properties

Class Name	Prefer the 'IDictionary.TryAdd(TKey, TValue)' method (C#)
Significance	reliability
Mnemonic	ROSLYN.PERFORMANCE.CA1864
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="Prefer the 'IDictionary.TryAdd(TKey, TValue)' method (C#)"

Relevant Configuration File Parameters

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