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Asked: 2026-05-24T03:46:16+00:00

I have an enum in my application to represent the saving options where the

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I have an enum in my application to represent the saving options where the user can save the image with lines drawn, circles, rectangles or any combination, so I declared an enum to represent the saving option.

enum SaveOption{lines,circles,rectangles};

How can I use operators to;

  • Add option to the options
  • Remove option from the options
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1 Answer

  1. Editorial Team

    Mark the enum with the [Flags] attribute, and give each possible value a unique bit value:

    [Flags]
enum SaveOption
{
    lines = 0x1,
    circles = 0x2,
    rectangles = 0x4
}

    Then you can do this sort of thing:

    SaveOption options;

option = SaveOption.lines | SaveOption.circles; // lines + circles
option |= SaveOptions.rectangles; // now includes rectangles
option &= ~SaveOptions.circles; // now excludes circles

    Finally for ref, each option must have a value that is represented by a single bit, so in hex that’s 0x1, 0x2, 0x4, 0x8, then 0x10, 0x20, 0x40, 0x80 etc. Which is easier to remember than 1,2,4,8,16,32,64,128,256,512,1024,2048,4096,8192,16384,32768,65536. Which is as far as I remember 🙂

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