Marked code as obsolete as there is a better way to run things in par…

…allel.

src/Foundatio/Utility/Run.cs

@@ -25,6 +25,7 @@ public static Task DelayedAsync(TimeSpan delay, Func<Task> action, CancellationT
         }, cancellationToken);
     }
 
+    [Obsolete("Use Parallel.ForEachAsync")]
     public static Task InParallelAsync(int iterations, Func<int, Task> work)
     {
         return Task.WhenAll(Enumerable.Range(1, iterations).Select(i => Task.Run(() => work(i))));