Update thread-pooling.md - fix typo (#4957)

Author: yuanstanley

docs/csharp/programming-guide/concepts/threading/thread-pooling.md

@@ -56,7 +56,7 @@ private void AnotherLongTask(Object state)
 ## Thread Pool Parameters and Return Values  
  Returning values from a thread-pool thread is not straightforward. The standard way of returning values from a function call is not allowed because `Sub` procedures are the only type of procedure that can be queued to a thread pool. One way you can provide parameters and return values is by wrapping the parameters, return values, and methods in a wrapper class as described in [Parameters and Return Values for Multithreaded Procedures (C#)](../../../../csharp/programming-guide/concepts/threading/parameters-and-return-values-for-multithreaded-procedures.md).  
 
- An easer way to provide parameters and return values is by using the optional `ByVal` state object variable of the <xref:System.Threading.ThreadPool.QueueUserWorkItem%2A> method. If you use this variable to pass a reference to an instance of a class, the members of the instance can be modified by the thread-pool thread and used as return values.  
+ An easier way to provide parameters and return values is by using the optional `ByVal` state object variable of the <xref:System.Threading.ThreadPool.QueueUserWorkItem%2A> method. If you use this variable to pass a reference to an instance of a class, the members of the instance can be modified by the thread-pool thread and used as return values.  
 
  At first it may not be obvious that you can modify an object referred to by a variable that is passed by value. You can do this because only the object reference is passed by value. When you make changes to members of the object referred to by the object reference, the changes apply to the actual class instance.