C# - Does function get called for each iteration of a foreach loop? [duplicate]

Answer 1

It will only be called once.

The foreach loop is equivalent to the following code:

IEnumerable enumerator = (collection).GetEnumerator();
try {
   while (enumerator.MoveNext()) {
      string part = (string)enumerator.Current;

      // Do Something or other. 

   }
} finally {
   IDisposable disposable = enumerator as System.IDisposable;
   if (disposable != null) disposable.Dispose();
}