Question

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How do foreach loops work in C#?

Just like classic iterative statments like for, while or do-while, is foreach loop is a new loop statment in c#? or in other languages such as php

OR

behind the scenes it translate our code to for, while or do-while loop.

Answer 1

The foreach construction is equivalent to:

IEnumerator enumerator = myCollection.GetEnumerator();
try
{
   while (enumerator.MoveNext())
   {
       object current = enumerator.Current;
       Console.WriteLine(current);
   }
}
finally
{
   IDisposable e = enumerator as IDisposable;
   if (e != null)
   {
       e.Dispose();
   }
}

Note that this version is the non generic one. The compiler can handle IEnumerator<T>.