Collection was modified; enumeration operation may not execute for hashtable
c#, enumeration
Solution
The traditional way is, in your foreach loop, to collect the items to be deleted into, say, a List. Then once the foreach loop has finished, do another foreach over that List (not over tMap this time), calling tMap.Remove:
void timerFunction(object data)
{
lock (tMap.SyncRoot)
{
List<UInt32> toRemove = new List<UInt32>();
foreach (UInt32 id in tMap.Keys)
{
MyObj obj=(MyObj) runScriptMap[id];
obj.time = obj.time -1;
if (obj.time <= 0)
{
toRemove.Add(id);
}
}
foreach (UInt32 id in toRemove)
{
tMap.Remove(id);
}
}
}
Problem
I have this timer function, it gives me following exception. Collection was modified; enumeration operation may not execute once i remove the object from hashtable. what is the solution to implement similar functionality ``` void timerFunction(object data) { lock (tMap.SyncRoot) { foreach (UInt32 id in tMap.Keys) { MyObj obj=(MyObj) runScriptMap[id]; obj.time = obj.time -1; if (obj.time <= 0) { tMap.Remove(id); } } } ```