What is the best way to iterate over a dictionary?

Question

I\'ve seen a few different ways to iterate over a dictionary in C#. Is there a standard way?

Answer 1

As of C# 7, you can deconstruct objects into variables. I believe this to be the best way to iterate over a dictionary.

Example:

Create an extension method on KeyValuePair that deconstructs it:

public static void Deconstruct(this KeyValuePair pair, out TKey key, out TVal value)
{
   key = pair.Key;
   value = pair.Value;
}

Iterate over any Dictionary in the following manner

// Dictionary can be of any types, just using 'int' and 'string' as examples.
Dictionary dict = new Dictionary();

// Deconstructor gets called here.
foreach (var (key, value) in dict)
{
   Console.WriteLine($"{key} : {value}");
}