How can I create an IEnumerable from an enum [duplicate]

Answer 1

You can use Enum.GetValues:

City[] values = (City[])Enum.GetValues(typeof(City));
var valuesWithNames = from value in values
                      select new { value = (int)value, name = value.ToString() };

Answer 2

You can try this:

var cities Enum.GetValues(typeof(City)).OfType<City>()
               .Select(x =>
                    new
                    {
                         Value =  (int)x,
                         Text = x.ToString()
                    });

EDIT

with cast instead of OfType

var cities = ((IEnumerable<City>)Enum.GetValues(typeof(City)))
                                     .Select(x => 
                                         new 
                                         {
                                             Value =  (int)x,
                                             Text = x.ToString()
                                         });

Answer 3

How about:

//Tested on LINQPad
void Main()
{
    var test = GetDictionary<City>();
    Console.WriteLine(test["London"]);
}

public static IDictionary<string, int> GetDictionary<T>()
{
    Type type = typeof(T);
    if (type.IsEnum)
    {
        var values = Enum.GetValues(type);
        var result = new Dictionary<string, int>();
        foreach (var value in values)
        {
            result.Add(value.ToString(), (int)value);
        }
        return result;
    }
    else
    {
        throw new InvalidOperationException();
    }
}

public enum City
{
    London = 1,
    Liverpool = 20,
    Leeds = 25
}