Question

I have an Array list of a custom class which is essentially has two attributes Key and Value

public class myClass
{
    public key { get; set; }
    public value { get; set; }
}

ArrayList myList = new ArrayList();
// myList is a list of myClass

How can I sort myList by Key?

I’ve been doing this below in the past the problem is i can’t use it anymore because it doesn’t handle the case of duplicate keys, i cant have two of same keys in dictionary.

// pseudo code
loop and add to dictionary (Key, Value)  
sort dictionary  
Dictionary<string, string> sortedTypes = myList.
    OrderBy(i => i.Key).ToDictionary(i => i.Key, i => i.Value);

edit: I need it sorted by key first then value as second criteria

Answer 1

First of all: Don’t use ArrayList. Use the generic type List<myClass> instead.

Then, just use the List.Sort method, passing an appropriate delegate to use for the comparison.

list.Sort((x, y)=>x.key.CompareTo(y.key))