便利 - sklab @ ウィキ

• Array.ForEach<T>

             string[] str = { "test00", "test01", "test02" };
             Array.ForEach<string>(str, (s) =>
             {
                 Console.WriteLine(s);
             });
  

• foreachにindex付与

             string[] str = { "test00", "test01", "test02" };
             foreach(var s in str.Select((value, index) =>new {value , index})){
                 Console.Write(s.value+ "  ");
                 Console.WriteLine(s.index);
             }
  

• foreachの仕組み

  foreach(型名 変数 in コレクション)
    文
   ↓↓
  IEnumerator e = array.GetEnumerator();
  while(e.MoveNext())
  {
    型名 変数 = (型名)e.Current;
    文
  }