Use tuple to swap values (IDE0180)

Property	Value
Rule ID	IDE0180
Title	Use tuple to swap values
Category	Style
Subcategory	Language rules (expression-level preferences)
Applicable languages	C#
Options	csharp_style_prefer_tuple_swap

Overview

This style rule flags code that swaps two values using multiple lines of code instead of using a tuple.

Options

Options specify the behavior that you want the rule to enforce. For information about configuring options, see Option format.

csharp_style_prefer_tuple_swap

Property	Value	Description
Option name	csharp_style_prefer_tuple_swap
Option values	true	Prefer using a tuple to swap two values.
	false	Disables the rule.
Default option value	true

Example

List<int> numbers = new List<int>() { 5, 6, 4 };

// Violates IDE0180.
int temp = numbers[0];
numbers[0] = numbers[1];
numbers[1] = temp;

// Fixed code.
(numbers[1], numbers[0]) = (numbers[0], numbers[1]);

Suppress a warning

If you want to suppress only a single violation, add preprocessor directives to your source file to disable and then re-enable the rule.

#pragma warning disable IDE0180
// The code that's violating the rule is on this line.
#pragma warning restore IDE0180

To disable the rule for a file, folder, or project, set its severity to none in the configuration file.

[*.{cs,vb}]
dotnet_diagnostic.IDE0180.severity = none

To disable all of the code-style rules, set the severity for the category Style to none in the configuration file.

[*.{cs,vb}]
dotnet_analyzer_diagnostic.category-Style.severity = none

For more information, see How to suppress code analysis warnings.

See also

• Code style language rules
• Code style rules reference