List>> add; When i clear the TempLst the MasterLst also get clear

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In my code i am using MasterLst of List<keyvaluepair><int,>>> type of list.

When i add a TempLst of List<timespansent> type to MasterLst and then when i Clear the TempLst the MasterLst Also get Clear.
How can i Avoid this

Code:

C#

static List<keyvaluepair><int,>>> Masterlst = new List<keyvaluepair><int,>>>();

List<timespansent> lsttemp = new List<timespansent>();


for (int i = 0; i < lstday.Count; i++)
{
lsttemp.Add(lstday[i]);
}
Masterlst.Add(new KeyValuePair<int,>>(DayID, lsttemp));

                          lsttemp.Clear();

Please Help me...
Thanks in Advance....

Posted 25-May-12 2:37am

curiouspoo

Updated 25-May-12 3:11am

Maciej Los

v2

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Comments

Jim Jos 25-May-12 8:50am

List<int,>>> Could you explain wat type of generic is it? are you missing two more declarations? lsttemp is added to the master list as reference not as copy!! so when you clear lsttemp masterlst value will also be cleared

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Mark Kruger · Accepted Answer · 2012-05-25T02:48:00

The problem u've is that lsttemp it's reference is added to Masterlst, in other words the Masterlst lsttemps version is the same as lsttemps seperate list declaration.

If u want to keep track of the list in masterlst u'll need a 2nd list which u place in masterlst.

But if i understand your example correctly u only want to clear lsttemps cause u've added it to the masterlst, isn't it?

If so just don't clear lsttemp set it's value to null instead, so the only reference keeper remaining is masterlst, when u remove the list from the masterlist u could decide to clear it then, or not at all if u want the garbagecollector to take care of it all.

I hope i've supplied enough information.