How do I sum values from two dictionaries in C#?

Question

I have two dictionaries with the same structure:

Dictionary foo = new Dictionary() 
{
    {\"Table\", 5 },
    {\"Chair         


        

Answer 1

I wrote a little extension method that will merge a list of dictionaries with Int values. I used code from this question to do it so I am sharing

    public static Dictionary MergeIntDictionary( this ICollection> source )
    {
        return source.Aggregate( ( cur, next ) => cur.Concat( next )
            .GroupBy( o => o.Key )
            .ToDictionary( item => item.Key, item => item.Sum( o => o.Value ) ) );
    }