C# collection class like STL Map

[Guest]

I am looking for a collection class that can act like map class of STL like
it provides me functionality to return nearby key e.g. I have a collection
like

1 "ABC"
2 "XYZ"
4 "sdf"

Now if I find out a nearby key to 3 it should return me

2 "XYZ"

Avnish.

 

[MuZZy]

I am looking for a collection class that can act like map class of STL like
it provides me functionality to return nearby key e.g. I have a collection
like

1 "ABC"
2 "XYZ"
4 "sdf"

Now if I find out a nearby key to 3 it should return me

2 "XYZ"

Avnish.

I think NameValueCollection class is the closest you can get to STL map<>.