Do and Run

   1:          /// <summary>

   2:          /// Runs action against the specified source.

   3:          /// </summary>

   4:          /// <typeparam name="T">The type of the element.</typeparam>

   5:          /// <param name="source">The source.</param>

   6:          /// <param name="action">The action.</param>

   7:          public static void Run<T>(this IEnumerable<T> source, Function<T> action)

   8:          {

   9:              if (source == null)

  10:              {

  11:                  throw new ArgumentNullException("source");

  12:              }

  13:   

  14:              if (action == null)

  15:              {

  16:                  throw new ArgumentNullException("action");

  17:              }

  18:   

  19:              foreach (var element in source)

  20:              {

  21:                  action(element);

  22:              }

  23:          }

  24:   

  25:          /// <summary>

  26:          /// Does action against the specified source and returns the source.

  27:          /// </summary>

  28:          /// <typeparam name="T">The type of the element.</typeparam>

  29:          /// <param name="source">The source.</param>

  30:          /// <param name="action">The action.</param>

  31:          /// <returns>The source after the action is executed.</returns>

  32:          public static IEnumerable<T> Do<T>(this IEnumerable<T> source, Function<T> action)

  33:          {

  34:              if (source == null)

  35:              {

  36:                  throw new ArgumentNullException("source");

  37:              }

  38:   

  39:              if (action == null)

  40:              {

  41:                  throw new ArgumentNullException("action");

  42:              }

  43:   

  44:              return source.Select(

  45:                  element =>

  46:                  {

  47:                      action(element);

  48:                      return element;

  49:                  });

  50:          }