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

I don't know if there is an existing method but you could use the following (null checking of args omitted for brevity)

public static bool DictionaryEquals(
  this Dictionary left,
  Dictionary right ) { 

  var comp = EqualityComparer.Default;
  if ( left.Count != right.Count ) { 
    return false;
  }
  foreach ( var pair in left ) {
    TValue value;
    if ( !right.TryGetValue(pair.Key, out value) 
         || !comp.Equals(pair.Value, value) ) {
      return false;
    }
  } 
  return true;
}

It would be best to add an overload to allow customization of the EqualityComparer.