WebSep 15, 2024 · Concatenation is the process of appending one string to the end of another string. You concatenate strings by using the + operator. For string literals and string … WebFeb 28, 2024 · var myDictionary = dbContext.myDbTable .Where (i => i.shoesize >= 4) // filter .GroupBy (x => x.Code) // group by Code .Select (g => g.First ()) // select 1st item from each group .ToDictionary (i => i.Code, i => i); You don't need the OrderBy since Dictionary s represent an unordered collection.
Абстрактная алгебра в действии / Хабр
WebJun 13, 2011 · key;value,key;value,key;value So far I have tried to use concat: var originalKeyValues = entity.ChangeTracker.OriginalValues.Keys.Concat ( entity.ChangeTracker.OriginalValues.Values).ToString (); ...but this doesn't seem to produce what I want. Both Keys and Values are Dictionary c# linq Share Improve …
How do I sum values from two dictionaries in C#?
WebDec 21, 2011 · 5 Answers Sorted by: 20 A Solution in C# Here is a solution using the aggregate extension method: string result = values.Aggregate ("", (keyString, pair) => keyString + "\n" + pair.Key + ":" + pair.Value.Aggregate ("", (str, val) => str + "\n\t" + val) );WebFeb 15, 2012 · Pass your dictionary (or list, queue, stack, whatever) to Serialize and the function returns a string representing that object, like this: string mystr = Serialize (mydict); To return the object from the string created by the Serialize function, pass that string to Unserialize and it will return an object. WebMay 23, 2024 · Dictionary> result = dict1 .Concat (dict2) .Concat (dict3) .Concat (dict4) .Concat (dict5) .GroupBy (e => e.Key, e => e.Value) .ToDictionary (g => g.Key, v => v.ToList ()); Instead of creating a List of values, you could insert them into a HashSet to only keep unique values. phone number for state farm