IDE0110Unnecessary code rules (expression-level preferences)

Remove unnecessary discard

Description

This rule flags unnecessary discard patterns. A discard pattern is unnecessary when used in a context where it has no effect.

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;
}

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