C# Data Structure Like Dictionary But Without A Value
Solution 1:
Yes, it's called a HashSet<T>, and available in version 3.5 of the .NET framework. If you use .NET version 2.0, you can use a Dictionary and set values to null.
Solution 2:
If 3.5 is not an option you could do something like Dictionary < int, int > and simply ignore the value. i've done this in 2.0 and i tend to set the value to the same as the key.
Solution 3:
If you're not targeting .NET 3.5, Power Collections (open source) also provides a Set implementation.