Possible Duplicate:
Why can't I retrieve an item from a HashSet without enumeration?
I need to add a lot of objects to a Set.and I should retrieve them very fast. The only way that I know is using hash. But the HashSet class in C# doesn't contain any 'Get' method. The dictionary class isn't useful because Finding an object is very time-consuming in a dictionary.
The HashSet represents a number of values. You can look if a certain value is in the set by using Contains(). A Dictionary is for storing objects and retrieving it by its hash (key).
using System;
using System.Collections.Generic;
namespace ConsoleApplication1
{
class Program
{
public enum EnumA
{
One,
Two,
Three,
Four
}
static void Main(string[] args)
{
HashSet<EnumA> test = new HashSet<EnumA>();
test.Add(EnumA.Four);
Console.WriteLine("Contains one:");
Console.WriteLine(test.Contains(EnumA.One));
Console.WriteLine("Contains four:");
Console.WriteLine(test.Contains(EnumA.Four));
Console.WriteLine();
Console.ReadLine();
return;
}
}
}