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Add missing cases to switch statement (IDE0010)

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Property Value
Rule ID IDE0010
Title Add missing cases to switch statement
Category Style
Subcategory Language rules (expression-level preferences)
Applicable languages C# and Visual Basic

Overview

This rule concerns specifying all the missing switch cases for a switch statement. A switch statement is considered incomplete in the following scenarios:

  • An enum switch statement that's missing cases for one or more enum members.
  • A switch statement with a missing default case.

Options

This rule has no associated code-style options.

Example

enum E
{
    A,
    B
}

class C
{
    // Code with violations
    int M(E e)
    {
        // IDE0010: Add missing cases
        switch (e)
        {
            case E.A:
                return 0;
        }

        return -1;
    }

    // Fixed code
    int M(E e)
    {
        switch (e)
        {
            case E.A:
                return 0;
            case E.B:
                return 1;
            default:
                return -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 IDE0010
// The code that's violating the rule is on this line.
#pragma warning restore IDE0010

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

[*.{cs,vb}]
dotnet_diagnostic.IDE0010.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