C #: enum

C # enum type is similar to C + +, generally we set the enum to a single state, such as enum color_t {RED, BLACK, GREEN}, can only select one

And sometimes enumerations can be used as bitwise operations to perform with or operations, such as the ControlStyles enumeration, to see a section of code from Tabcontrolex

1            Base . SetStyle (2                 controlstyles.userpaint |  3                 Controlstyles.optimizeddoublebuffer |  4                 Controlstyles.allpaintinginwmpaint |  5                 Controlstyles.resizeredraw |  6                controlstyles.supportstransparentbackcolor,7                 true); 8             base. UpdateStyles ();       

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Here I wrote a piece of code to see if the individual bit is set, note that the & priority is smaller than >, need parentheses up

1 usingSystem;2 usingSystem.Collections.Generic;3 usingSystem.Linq;4 usingSystem.Text;5 6 namespacetest47 {8     class Program9     {Ten         #region One          Public enum Person A         { -ID1 =1, -ID2 =2 the         } -         #endregion -         Static voidMain (string[] args) -         { +person n = person. Id1 |Person . ID2; -             //Person n = person.id1; +             if(N & Person. ID1) >0) Console.WriteLine ("You 1"); A             if(N & Person. ID2) >0) Console.WriteLine ("You 2"); at             if(N & Person. ID1) >0&& (n & person. ID2) >0) Console.WriteLine ("You 1 He 2"); -Console.WriteLine ((int) n). ToString ()); -         } -     } -}

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C #: enum