how to make accessor for Dictionary in a way that returned Dictionary cannot be changed C# / 2.0
- by matti
I thought of solution below because the collection is very very small. But what if it was big?
private Dictionary<string, OfTable> _folderData = new Dictionary<string, OfTable>();
public Dictionary<string, OfTable> FolderData
{
get { return new Dictionary<string,OfTable>(_folderData); }
}
With List you can make:
public class MyClass
{
private List<int> _items = new List<int>();
public IList<int> Items
{
get { return _items.AsReadOnly(); }
}
}
That would be nice!
Thanks in advance, Cheers & BR - Matti
NOW WHEN I THINK THE OBJECTS IN COLLECTION ARE IN HEAP. SO MY SOLUTION DOES NOT PREVENT THE CALLER TO MODIFY THEM!!! CAUSE BOTH Dictionary s CONTAIN REFERENCES TO SAME OBJECT. DOES THIS APPLY TO List EXAMPLE ABOVE?
class OfTable
{
private string _wTableName;
private int _table;
private List<int> _classes;
private string _label;
public OfTable()
{
_classes = new List<int>();
}
public int Table
{
get { return _table; }
set { _table = value; }
}
public List<int> Classes
{
get { return _classes; }
set { _classes = value; }
}
public string Label
{
get { return _label; }
set { _label = value; }
}
}
so how to make this immutable??
