Multi-dimensional arraylist or list in C

Question

Is it possible to create a multidimensional list in C   I can create an multidimensional array like so    string    results   new string 20  2     But I would like to be able to use some of the features in a list or arraylist like being able to add and delete elements

User · Answer

you just make a list of lists like so   List lt List lt string gt  gt  results   new List lt List lt string gt  gt       and then it s just a matter of using the functionality you want  results Add new List lt string gt        adds a new list to your list of lists results 0  Add  this is a string      adds a string to the first list results 0  0     gets the first string in your first list

User · Answer

You can create a list of lists     public class MultiDimList  List lt List lt string gt  gt         or a Dictionary of key-accessible Lists     public class MultiDimDictList  Dictionary lt string  List lt int gt  gt          MultiDimDictList myDicList   new MultiDimDictList        myDicList Add  ages   new List lt int gt          myDicList Add  Salaries   new List lt int gt          myDicList Add  AccountIds   new List lt int gt         Generic versions  to implement suggestion in comment from  user420667    public class MultiDimList lt T gt   List lt List lt T gt  gt         and for the dictionary      public class MultiDimDictList lt K  T gt   Dictionary lt K  List lt T gt  gt             to use it  in client code    var myDicList   new MultiDimDictList lt string  int gt         myDicList Add  ages   new List lt T gt          myDicList  ages   Add 23      myDicList  ages   Add 32      myDicList  ages   Add 18       myDicList Add  salaries   new List lt T gt         myDicList  salaries   Add 80000      myDicList  salaries   Add 100000       myDicList Add  accountIds   new List lt T gt          myDicList  accountIds   Add 321123      myDicList  accountIds   Add 342653     or  even better          public class MultiDimDictList lt K  T gt   Dictionary lt K  List lt T gt  gt                public void Add K key  T addObject                      if  ContainsKey key   Add key  new List lt T gt                 if   base key  Contains addObject   base key  Add addObject                                   and to use it  in client code     var myDicList   new MultiDimDictList lt string  int gt          myDicList Add  ages   23       myDicList Add  ages   32       myDicList Add  ages   18       myDicList Add  salaries   80000       myDicList Add  salaries   110000       myDicList Add  accountIds   321123       myDicList Add  accountIds   342653     EDIT   to include an Add   method for nested instance       public class NestedMultiDimDictList lt K  K2  T gt               MultiDimDictList lt K  MultiDimDictList lt K2  T gt  gt             public void Add K key  K2 key2  T addObject                      if  ContainsKey key   Add key                     new MultiDimDictList lt K2  T gt                 if   base key  Contains key2                   base key  Add key2  addObject

User · Answer

If you want to modify this I d go with either of the following   List lt string   gt  results    -- or --  List lt List lt string gt  gt  results    depending on your needs

User · Answer

Not exactly  But you can create a list of lists   var ll   new List lt List lt int gt  gt     for int i   0  i  lt  10    i        var l   new List lt int gt         ll Add l

User · Answer

Depending on your exact requirements  you may do best with a jagged array of sorts with   List lt string gt    results   new   new List lt string gt     new List lt string gt         Or you may do well with a list of lists or some other such construct

[c#] Multi-dimensional arraylist or list in C#?

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