C # Permissions binary operations

   /// <summary>    ///bit arithmetic, binary/// </summary>[Flags] Public enumPermissionenum {/// <summary>        ///Initialize///0000/// </summary>Init =0,        /// <summary>        ///Insert///0001/// </summary>Insert =1,        /// <summary>        ///Delete///0010/// </summary>Delete =2,        /// <summary>        ///Update///0100/// </summary>Update =4,        /// <summary>        ///Enquiry/// +/// </summary>Query =8    }

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    classProgram {Static voidMain (string[] args) {            //Initialize a new permission            varDemo =insertpermission (Permissionenum.insert);            Console.WriteLine (demo); //Add one more query permissionDemo =insertpermission (Permissionenum.query, demo);            Console.WriteLine (demo); //Add one more Delete permissionDemo =insertpermission (Permissionenum.delete, demo);            Console.WriteLine (demo); //Remove a new permissionDemo =deletepermission (Permissionenum.insert, demo);            Console.WriteLine (demo); //determine if you have new permissionsConsole.WriteLine (Getpermission (Permissionenum.insert, demo)); //determine if you have query permissionsConsole.WriteLine (Getpermission (Permissionenum.query, demo));        Console.read (); }        /// <summary>        ///Increase Permissions/// </summary>        /// <param name= "Pertype" >What permissions need to be added (additional deletions)</param>        /// <param name= "Userper" >User's original permission</param>        /// <returns></returns>         Public Static intInsertpermission (Permissionenum Pertype,intUserper = (int) {permissionenum.init) {//or the operation is true or false;            returnUserper | (int) Pertype; }        /// <summary>        ///Delete Permissions/// </summary>        /// <param name= "Pertype" >What permissions need to be removed (additional deletions)</param>        /// <param name= "Userper" >User's original permission</param>        /// <returns></returns>         Public Static intDeletePermission (Permissionenum Pertype,intUserper = (int) {permissionenum.init) {//~ complement, ~000010 = 111101//& And, True True, false and true            returnUserper & ~ (int) Pertype; }        /// <summary>        ///Determine if you have permissions/// </summary>        /// <param name= "Pertype" >Determine whether a permission type is owned</param>        /// <param name= "Userper" >User's original permission</param>        /// <returns></returns>         Public Static BOOLGetpermission (Permissionenum Pertype,intUserper = (int) {permissionenum.init) {//& And, True True, false and true//The number that is judged is not equal to zero, which is to have this permission            return(Userper & (int) pertype)! =0; }

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C # Permissions binary operations