c# - How to prevent duplicate values in enum?

Question

I wonder is there a way to prevent an enum with duplicate keys to compile?

For instance this enum below will compile

public enum EDuplicates
{
    Unique,
    Duplicate = 0,
    Keys = 1,
    Compilation = 1
}

Although this code

Console.WriteLine(EDuplicates.Unique);
Console.WriteLine(EDuplicates.Duplicate);
Console.WriteLine(EDuplicates.Keys);
Console.WriteLine(EDuplicates.Compilation);

Will print

Duplicate
Duplicate
Keys
Keys

Answer 1

Here's a simple unit test that checks it, should be a bit faster:

[TestMethod]
public void Test()
{
  var enums = (myEnum[])Enum.GetValues(typeof(myEnum));
  Assert.IsTrue(enums.Count() == enums.Distinct().Count());
}