Comparing 2 Dictionary Instances

Question

I want to compare the contents of two Dictionary instances regardless of the order of the items they contain. SequenceEquals

Answer 1

var contentsEqual = source.DictionaryEqual(target);

// ...

public static bool DictionaryEqual(
    this IDictionary first, IDictionary second)
{
    return first.DictionaryEqual(second, null);
}

public static bool DictionaryEqual(
    this IDictionary first, IDictionary second,
    IEqualityComparer valueComparer)
{
    if (first == second) return true;
    if ((first == null) || (second == null)) return false;
    if (first.Count != second.Count) return false;

    valueComparer = valueComparer ?? EqualityComparer.Default;

    foreach (var kvp in first)
    {
        TValue secondValue;
        if (!second.TryGetValue(kvp.Key, out secondValue)) return false;
        if (!valueComparer.Equals(kvp.Value, secondValue)) return false;
    }
    return true;
}