Convert enum to list in C#

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C# - Convert Enum to List

In C#, you can transform an enumeration into a list by employing the Enum.GetValues method in conjunction with the LINQ ToList extension method. The Enum.GetValues method gets all the enum values in an array, and you can change that array into a list using the ToList method in the LINQ namespace.

Here's an example:



enum DaysOfWeek
{
    Monday,
    Tuesday,
    Wednesday,
    Thursday,
    Friday,
    Saturday,
    Sunday
}

class Program
{
    static void Main()
    {
        List enumList = Enum.GetValues(typeof(DaysOfWeek))
                                       .Cast()
                                       .ToList();

        foreach (DaysOfWeek day in enumList)
        {
            Console.WriteLine(day);
        }
    }
}

The provided C# program defines an enumeration called DaysOfWeek, which represents the days of the week. It then uses the Enum.GetValues method to obtain an array of all the values defined in the DaysOfWeek enumeration, casts each value to the DaysOfWeek enum type, and finally converts the resulting array into a List<DaysOfWeek> using LINQ's Cast and ToList methods. The program then iterates through the enumList and prints each value to the console.

Expected Output

Here's the expected output of the program:


Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday

Explanation

Enum.GetValues(typeof(DaysOfWeek)): This line retrieves an array of all the values defined in the DaysOfWeek enumeration. Since the enum contains the days of the week, it includes Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, and Sunday.
.Cast<DaysOfWeek>(): The GetValues method returns an array of type System.Array, so we use the Cast method to convert each element in the array to the DaysOfWeek enum type.
.ToList(): After casting the values, we convert the resulting sequence into a List<DaysOfWeek>.
The foreach loop then iterates through each day in the enumList and prints it to the console using Console.WriteLine.

As a result, the program prints the names of the days of the week in the order they are defined in the DaysOfWeek enumeration, which is the output displayed above.