Question

I have class with 5 fields.

public class Test
{
public string name;
public string description;
public int int1;
public int int2;
public int int3;
}

In one of my function I have List<Test> list which has 10 items. Here I want SortedList<string,string> for two properties name & description.

I know, I can achieve this using for each but I want to know How can I do this using LINQ?

Answer 1

The answer from @HugoRune is quite exhaustive, but because you said you want to use Linq, I’d suggest to add an extension method in your scope to help you with your goal:

static class SortedListExtensions
{
    public static SortedList<K, V> ToSortedList<K, V, T>(
        this IEnumerable<T> source, 
        Func<T, K> keySelector, Func<T, V> valueSelector)
    {
        return new SortedList<K,V>(
            source.ToDictionary(
                cur => keySelector(cur), 
                cur => valueSelector(cur)));
    }
}

this way your SortedList creation is composable in Linq computations:

var sl = list.ToSortedList(f => f.name, f => f.description);