Code inspection: Some values of the enum are not processed inside 'switch' statement

When using a switch statement with an enum, it is not required to have a case statement for each enum value — if some values do not have cases, the switch will do nothing for such values.

Although missing cases might be intended by the author, more often than not it is a consequence of adding a new value to the enum and forgetting to update the switch accordingly.

ReSharper flags such switch statements as potential issues and suggests generating case statements for unhandled values.

  enum TestEnum
  {
    A,
    B
  }

  class Program
  {
    void Test(TestEnum testEnum)
    {
      // case 'TestEnum.B' is not handled and won't do anything
      switch (testEnum)
      {
        case TestEnum.A:
          Console.WriteLine("A");
          break;
      }
    }
  }
    

Last modified: 11 February 2024