>This is a basic question to enhance my understanding.
>
>In a loop is the condition tokenized once and checked every time or is it calculated in every iteration?
>
>Take this example:
>

>for (int i = 0; i < this.TreeView1.Nodes.Count; i++)
>{
>}
>

>
>or is it more efficient (faster) to do:
>

>int nCount = this.TreeView1.Nodes.Count;
>for (int i = 0; i < nCount; i++)
>{
>}
>

>
>Granted, in a short loop it does not really matter as the time differences would be measured in microseconds but the principle of the thing is what I'm looking for.
>
>Every little bit of new knowledge on .NET helps :)

Maybe:

for (int i = 0,nCount = this.TreeView1.Nodes.Count; i < nCount; i++)
{
// however question is: operation might depend on realtime
// nodes count? or a reverse iteration, count to 0?
// maybe you'd want to use a foreach() instead which uses an enumerator?

// foreach(TreeNode node in myTree.Nodes)
}

Unlike VFP's for, condition is a boolean and it is a version of while{} (and by language definition conditon is reevaluated each time). ie:

for(int i=0,j=5;i<j;i++)
{
 Console.WriteLine("i:{0} j:{1}",i,j);
 j--;
}

PS: Also it matters which Treeview control is this. Web or Windows.
Cetin