In depth analysis of the definition and use of enumeration types in c

introduce
Enumeration is a specified constant whose base type can be any integer except Char.
If the underlying type is not explicitly declared, Int32 is used.
Programming languages typically provide a syntax to declare an enumeration of a set of named constants and their values.

define
The default cardinality starts with O and can also be specified.
enum Days { Saturday=1, Sunday, Monday, Tuesday, Wednesday, Thursday, Friday };
enum Colors { Red = 1, Green = 2, Blue = 4, Yellow = 8 };

use
Colors myColors = Colors.Red;
string strColor=myColors.tostring();
int IntColor=(int)myColors ;

or
Colors myColors = Colors.Red | Colors.Blue | Colors.Yellow;

with
Colors myColors = Colors.Red & Colors.Blue & Colors.Yellow;

traverse

foreach (string s in Enum.GetNames(typeof(Days)))
Response.Write(s + "--" + Enum.Parse(typeof(Days), s).ToString());

conversion

Colors mc=Colors Enum.Parse(typeof(Colors ), "red"); 
if (System.Enum.IsDefined(typeof(Days), "Monday"))
Days ds= (Days)Enum.Parse(typeof(Days), "Monday");

Example 2:

    public enum NoticeType
    {
        Notice = 'A',
        LabRule = 'H',
        HotInformation = 'N',
        Column = 'C',
        All = '1',
        Null = '0'
     }
     // New enumeration type 
        NoticeType noticeType1 = NoticeType.Column;
        // Converts the enumeration type to string d="Column"
        string d = noticeType1.ToString();
        // Gets the cardinality of an enumerated type  dd='C'
        char dd = (char)noticeType1;
        // Gets the corresponding enumeration type from the cardinality  noticeType2 = NoticeType.Notice
        //(NoticeType)'A';   Either way 
        NoticeType noticeType2 = (NoticeType)Char.Parse("A"); 
    // Gets an enumerated type by name  noticeType3 = NoticeType.Notice
        NoticeType noticeType3 = (NoticeType)Enum.Parse(typeof(NoticeType), "Notice");