CA1307: Specify StringComparison


For the latest documentation on Visual Studio 2017 RC, see Visual Studio 2017 RC Documentation.

Breaking ChangeNon-breaking

A string comparison operation uses a method overload that does not set a StringComparison parameter.

Many string operations, most important the Compare and Equals methods, provide an overload that accepts a StringComparison enumeration value as a parameter.

Whenever an overload exists that takes a StringComparison parameter, it should be used instead of an overload that does not take this parameter. By explicitly setting this parameter, your code is often made clearer and easier to maintain.

To fix a violation of this rule, change string comparison methods to overloads that accept the StringComparison enumeration as a parameter. For example: change String.Compare(str1, str2) to String.Compare(str1, str2, StringComparison.Ordinal).

It is safe to suppress a warning from this rule when the library or application is intended for a limited local audience and will therefore not be localized.

Globalization Warnings
CA1309: Use ordinal StringComparison