Fixed minor typo

Author: alfredmyers

docs/standard/asynchronous-programming-patterns/implementing-the-task-based-asynchronous-pattern.md

@@ -85,7 +85,7 @@ Starting with the [!INCLUDE[net_v45](../../../includes/net-v45-md.md)], the <xre
 [!code-csharp[Conceptual.TAP_Patterns#5](../../../samples/snippets/csharp/VS_Snippets_CLR/conceptual.tap_patterns/cs/patterns1.cs#5)]
 [!code-vb[Conceptual.TAP_Patterns#5](../../../samples/snippets/visualbasic/VS_Snippets_CLR/conceptual.tap_patterns/vb/patterns1.vb#5)]
 
-The <xref:System.Threading.Tasks.TaskCompletionSource%601> class doesn't have a non-generic counterpart. However, <xref:System.Threading.Tasks.Task%601> derives from <xref:System.Threading.Tasks.Task>, so you can use the generic <xref:System.Threading.Tasks.TaskCompletionSource%601> object for I/O-bound methods that simply return a task. To do this, you can use a source with a dummy `TResult` (<xref:System.Boolean> is a good default choice, but if you're concerned about the user of the <xref:System.Threading.Tasks.Task>downcasting it to a <xref:System.Threading.Tasks.Task%601>, you can use a private `TResult` type instead). For example, the `Delay` method in the previous example returns the current time along with the resulting offset (`Task<DateTimeOffset>`). If such a result value is unnecessary, the method could instead be coded as follows (note the change of return type and the change of argument to <xref:System.Threading.Tasks.TaskCompletionSource%601.TrySetResult%2A>):
+The <xref:System.Threading.Tasks.TaskCompletionSource%601> class doesn't have a non-generic counterpart. However, <xref:System.Threading.Tasks.Task%601> derives from <xref:System.Threading.Tasks.Task>, so you can use the generic <xref:System.Threading.Tasks.TaskCompletionSource%601> object for I/O-bound methods that simply return a task. To do this, you can use a source with a dummy `TResult` (<xref:System.Boolean> is a good default choice, but if you're concerned about the user of the <xref:System.Threading.Tasks.Task> downcasting it to a <xref:System.Threading.Tasks.Task%601>, you can use a private `TResult` type instead). For example, the `Delay` method in the previous example returns the current time along with the resulting offset (`Task<DateTimeOffset>`). If such a result value is unnecessary, the method could instead be coded as follows (note the change of return type and the change of argument to <xref:System.Threading.Tasks.TaskCompletionSource%601.TrySetResult%2A>):
 
 [!code-csharp[Conceptual.TAP_Patterns#6](../../../samples/snippets/csharp/VS_Snippets_CLR/conceptual.tap_patterns/cs/patterns1.cs#6)]
 [!code-vb[Conceptual.TAP_Patterns#6](../../../samples/snippets/visualbasic/VS_Snippets_CLR/conceptual.tap_patterns/vb/patterns1.vb#6)]