Remove unnecessary discard (IDE0110)
Property | Value |
---|---|
Rule ID | IDE0110 |
Title | Remove unnecessary discard |
Category | Style |
Subcategory | Unnecessary code rules (expression-level preferences) |
Applicable languages | C# |
Overview
This rule flags unnecessary discard patterns. A discard pattern is unnecessary when used in a context where it has no effect.
Options
This rule has no associated code-style options.
Example
// Code with violations
switch (o)
{
case int _:
Console.WriteLine("Value was an int");
break;
case string _:
Console.WriteLine("Value was a string");
break;
}
// Fixed code
switch (o)
{
case int:
Console.WriteLine("Value was an int");
break;
case string:
Console.WriteLine("Value was a string");
break;
}
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 IDE0110
// The code that's violating the rule is on this line.
#pragma warning restore IDE0110
To disable the rule for a file, folder, or project, set its severity to none
in the configuration file.
[*.{cs,vb}]
dotnet_diagnostic.IDE0110.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
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