How to get dictionary values as a generic list

Question

I just want get a list from Dictionary values but it s not so simple as it appears    here the code    Dictionary lt string  List lt MyType gt  gt  myDico   GetDictionary    List lt MyType gt  items         I try    List lt MyType gt  items   new List lt MyType gt  myDico values    But it does not work  -

User · Answer

Dictionary lt string  MyType gt  myDico   GetDictionary     var items   myDico Select d  gt  d Value  ToList

User · Answer

Off course  myDico Values is List lt List lt MyType gt  gt    Use Linq if you want to flattern your lists  var items   myDico SelectMany  d   gt  d Value  ToList

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Another variation you could also use  MyType   Temp   new MyType myDico Count   myDico Values CopyTo Temp  0   List lt MyType gt  items   Temp ToList

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Going further on the answer of Slaks  if one or more lists in your dictionary is null  a System NullReferenceException will be thrown when calling ToList    play safe   List lt MyType gt  allItems   myDico Values Where x   gt  x    null  SelectMany x   gt  x  ToList

User · Answer

How about   var values   myDico Values ToList

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You probably want to flatten all of the lists in Values into a single list   List lt MyType gt  allItems   myDico Values SelectMany c   gt  c  ToList

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Another variant       List lt MyType gt  items   new List lt MyType gt         items AddRange myDico values

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List lt String gt  objListColor   new List lt String gt       Red    Blue    Green    Yellow             List lt String gt  objListDirection   new List lt String gt       East    West    North    South              Dictionary lt String  List lt String gt  gt  objDicRes   new Dictionary lt String  List lt String gt  gt             objDicRes Add  Color   objListColor           objDicRes Add  Direction   objListDirection

User · Answer

Use this   List lt MyType gt  items   new List lt MyType gt    foreach var value in myDico Values      items AddRange value     The problem is that every key in your dictionary has a list of instances as value  Your code would work  if each key would have exactly one instance as value  as in the following example   Dictionary lt string  MyType gt  myDico   GetDictionary    List lt MyType gt  items   new List lt MyType gt  myDico Values

User · Answer

My OneLiner    var MyList   new List lt MyType gt  MyDico Values

[c#] How to get dictionary values as a generic list

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