Remove bad Interlocked.Exchange example (dotnet#162)

* Removed bad Interlocked.Exchange example

* Removed another bad Interlocked.Exchange example

* Changed text to note

Author: svick

xml/System.Threading/Interlocked.xml

@@ -952,18 +952,10 @@
         <remarks>
           <format type="text/markdown"><![CDATA[  
   
-## Remarks  
- Beginning with .NET Framework version 2.0, the <xref:System.Threading.Interlocked.Exchange%60%601%28%60%600%40%2C%60%600%29> method overload provides a type-safe alternative for reference types.  
-  
-   
-  
-## Examples  
- The following code example shows the syntax for using `Exchange` with any reference type object.  
-  
- [!code-cpp[System.Threading.Interlocked.Exchange#1](~/samples/snippets/cpp/VS_Snippets_CLR_System/system.Threading.Interlocked.Exchange/CPP/source.cpp#1)]
- [!code-csharp[System.Threading.Interlocked.Exchange#1](~/samples/snippets/csharp/VS_Snippets_CLR_System/system.Threading.Interlocked.Exchange/CS/source.cs#1)]
- [!code-vb[System.Threading.Interlocked.Exchange#1](~/samples/snippets/visualbasic/VS_Snippets_CLR_System/system.Threading.Interlocked.Exchange/VB/source.vb#1)]  
-  
+## Remarks
+
+> [!NOTE]
+> Beginning with .NET Framework version 2.0, the <xref:System.Threading.Interlocked.Exchange%60%601%28%60%600%40%2C%60%600%29> method overload provides a type-safe alternative for reference types.  
  ]]></format>
         </remarks>
         <exception cref="T:System.ArgumentNullException">The address of <paramref name="location1" /> is a null pointer.</exception>
@@ -1067,17 +1059,6 @@
   
 > [!NOTE]
 >  This method overload is preferable to the <xref:System.Threading.Interlocked.Exchange%28System.Object%40%2CSystem.Object%29> method overload, because the latter requires late-bound access to the destination object .  
-  
-   
-  
-## Examples  
- The following example launches ten tasks, each of which generates  100 ten-character part numbers. It then the part number that is first alphabetically.  
-  
- [!code-csharp[System.Threading.Interlocked.Exchange#2](~/samples/snippets/csharp/VS_Snippets_CLR_System/system.Threading.Interlocked.Exchange/CS/Exchange5.cs#2)]
- [!code-vb[System.Threading.Interlocked.Exchange#2](~/samples/snippets/visualbasic/VS_Snippets_CLR_System/system.Threading.Interlocked.Exchange/VB/Exchange5.vb#2)]  
-  
- The example uses the `firstWidget` variable to store the ID that occurs first in the sort order. It compares each ID that it generates with the `firstWidget` value.  If the new value precedes the current value of `firstWidget` in the sort order, the example calls the <xref:System.Threading.Interlocked.Exchange%2A> method to assign the new value to `firstWidget`.  
-  
  ]]></format>
         </remarks>
         <exception cref="T:System.NullReferenceException">The address of <paramref name="location1" /> is a null pointer.</exception>
@@ -1326,4 +1307,4 @@
       </Docs>
     </Member>
   </Members>
-</Type>
+</Type>