C# lambda, local variable value not taken when you think?

Question

Suppose we have the following code:

void AFunction()
{

   foreach(AClass i in AClassCollection)
   {
      listOfLamb         


        

Answer 1

what is going on? does the lambda function somehow store a 'reference' to the variable or something?

Yes exactly that; c# captured variables are to the variable, not the value of the variable. You can usually get around this by introducing a temp variable and binding to that:

string astr = "a string";
var tmp = astr;
AFunc fnc = () => { System.Diagnostics.Debug.WriteLine(tmp); };

especially in foreach where this is notorious.