Flatten a C# Dictionary of Lists with Linq
Dictionary<string, List<string>>
	
var list = dictionary.Values              // To get just the List<string>s
                     .SelectMany(x => x)  // Flatten
                     .ToList();           // Listify
	
Dictionary.Values.SelectMany(x => x).ToList()
	
dict.SelectMany(pair => pair.Value.Select(str => str));
	
var flattened = from p in dictionary
                from s in p.Value
                select s;
	
var flattened = dictionary.SelectMany(p => p.Value);
	
dict.Values.Aggregate(new List<String>(), (a, b) => a.Concat(b));