C# Interleaving loops on the same collection

[sudhivns]

Hi,

I wann use the same collection in interleaving loops.
like
F1(..)
{
foreach(child prd in parent)
F2(prd )
}

F2(..)
{
foreach(child p in parent)
{
// which manipulate 'parent' collection by deleting an element here..
// This creats problem in F1 as the same collection is under use..
}

Any links/eg to handle this problem is greatly appreciated.
}

[Shashi Sadasivan]

Could you please describe your question more?

Are you trying to look for a way to shorten code by reusing code?

[sudhivns]

Yes intention behind it is code reuse:

Delete(..)
{
foreach (X x in Collection )
{
if(...)
DelNow(x)
}
}

DelNow(.. prd.. )
{

foreach(X a in Collection)
{
if(....)
{ del = true; break;}
}

Collection.Remove(prd)

}

Here DelNow() manipulates the Collection object, which is already under looping in function Delete(). Idea here is to reuse the DelNow() call in Delete() but under a looping of Collection Object. Hope this is clear now.

[Shashi Sadasivan]

Can you make a seperate method passing the collecrtion as a parameter

[r035198x]

If you are going to be deleting items from a collection that you are looping over then be careful that you won't run yourself into concurrent modification ...

[sudhivns]

I do not want to disturb DelNow() function either body or signature.
Only i can modify the Delete() function