remove inline C++ snippets (#11344)

Author: gewarren

xml/System.Collections.Generic/Dictionary`2+KeyCollection.xml

@@ -2489,7 +2489,7 @@
 
  Enumerating through a collection is intrinsically not a thread-safe procedure.  To guarantee thread safety during enumeration, you can lock the collection during the entire enumeration.  To allow the collection to be accessed by multiple threads for reading and writing, you must implement your own synchronization.
 
- The <xref:System.Collections.ICollection.SyncRoot%2A> property returns an object that can be used to synchronize access to the <xref:System.Collections.ICollection>. Synchronization is effective only if all threads lock the object before accessing the collection. The following code shows the use of the <xref:System.Collections.ICollection.SyncRoot%2A> property for C#, C++, and Visual Basic.
+ The <xref:System.Collections.ICollection.SyncRoot%2A> property returns an object that can be used to synchronize access to the <xref:System.Collections.ICollection>. Synchronization is effective only if all threads lock the object before accessing the collection. The following code shows the use of the <xref:System.Collections.ICollection.SyncRoot%2A> property.
 
 ```csharp
 ICollection ic = ...;
@@ -2505,18 +2505,7 @@ SyncLock ic.SyncRoot
 End SyncLock
 ```
 
-```cpp
-ICollection^ ic = ...;
-try {
-   Monitor::Enter(ic->SyncRoot);
-   // Access the collection.
-}
-finally {
-   Monitor::Exit(ic->SyncRoot);
-}
-```
-
- Getting the value of this property is an O(1) operation.
+Getting the value of this property is an O(1) operation.
 
  ]]></format>
         </remarks>

xml/System.Collections.Generic/Dictionary`2+ValueCollection.xml

@@ -2331,7 +2331,7 @@
 
  Enumerating through a collection is intrinsically not a thread-safe procedure.  To guarantee thread safety during enumeration, you can lock the collection during the entire enumeration.  To allow the collection to be accessed by multiple threads for reading and writing, you must implement your own synchronization.
 
- <xref:System.Collections.ICollection.SyncRoot%2A> returns an object that can be used to synchronize access to the <xref:System.Collections.ICollection>. Synchronization is effective only if all threads lock this object before accessing the collection. The following code shows the use of the <xref:System.Collections.ICollection.SyncRoot%2A> property for C#, C++, and Visual Basic.
+ <xref:System.Collections.ICollection.SyncRoot%2A> returns an object that can be used to synchronize access to the <xref:System.Collections.ICollection>. Synchronization is effective only if all threads lock this object before accessing the collection. The following code shows the use of the <xref:System.Collections.ICollection.SyncRoot%2A> property.
 
 ```csharp
 ICollection ic = ...;
@@ -2347,18 +2347,7 @@ SyncLock ic.SyncRoot
 End SyncLock
 ```
 
-```cpp
-ICollection^ ic = ...;
-try {
-   Monitor::Enter(ic->SyncRoot);
-   // Access the collection.
-}
-finally {
-   Monitor::Exit(ic->SyncRoot);
-}
-```
-
- Retrieving the value of this property is an O(1) operation.
+Retrieving the value of this property is an O(1) operation.
 
  ]]></format>
         </remarks>

xml/System.Collections.Generic/Dictionary`2.xml

@@ -4539,7 +4539,7 @@ Public Function StartsWith(e As Employee) As Boolean
 
  Enumerating through a collection is intrinsically not a thread-safe procedure.  To guarantee thread safety during enumeration, you can lock the collection during the entire enumeration.  To allow the collection to be accessed by multiple threads for reading and writing, you must implement your own synchronization.
 
- <xref:System.Collections.ICollection.SyncRoot%2A> returns an object that can be used to synchronize access to the <xref:System.Collections.ICollection>. Synchronization is effective only if all threads lock this object before accessing the collection. The following code shows the use of the <xref:System.Collections.ICollection.SyncRoot%2A> property for C#, C++, and Visual Basic.
+ <xref:System.Collections.ICollection.SyncRoot%2A> returns an object that can be used to synchronize access to the <xref:System.Collections.ICollection>. Synchronization is effective only if all threads lock this object before accessing the collection. The following code shows the use of the <xref:System.Collections.ICollection.SyncRoot%2A> property.
 
 ```csharp
 ICollection ic = ...;
@@ -4556,20 +4556,7 @@ SyncLock ic.SyncRoot
 End SyncLock
 ```
 
-```cpp
-ICollection^ ic = ...;
-try
-{
-    Monitor::Enter(ic->SyncRoot);
-    // Access the collection.
-}
-finally
-{
-    Monitor::Exit(ic->SyncRoot);
-}
-```
-
- Retrieving the value of this property is an O(1) operation.
+Retrieving the value of this property is an O(1) operation.
 
  ]]></format>
         </remarks>

xml/System.Collections.Generic/LinkedList`1.xml

@@ -1252,7 +1252,7 @@
 
  Enumerating through a collection is intrinsically not a thread-safe procedure.  To guarantee thread safety during enumeration, you can lock the collection during the entire enumeration.  To allow the collection to be accessed by multiple threads for reading and writing, you must implement your own synchronization.
 
- <xref:System.Collections.ICollection.SyncRoot%2A> returns an object, which can be used to synchronize access to the <xref:System.Collections.ICollection>. Synchronization is effective only if all threads lock this object before accessing the collection. The following code shows the use of the <xref:System.Collections.ICollection.SyncRoot%2A> property for C#, C++, and Visual Basic.
+ <xref:System.Collections.ICollection.SyncRoot%2A> returns an object, which can be used to synchronize access to the <xref:System.Collections.ICollection>. Synchronization is effective only if all threads lock this object before accessing the collection. The following code shows the use of the <xref:System.Collections.ICollection.SyncRoot%2A> property.
 
 ```csharp
 ICollection ic = ...;
@@ -1268,18 +1268,7 @@ SyncLock ic.SyncRoot
 End SyncLock
 ```
 
-```cpp
-ICollection^ ic = ...;
-try {
-   Monitor::Enter(ic->SyncRoot);
-   // Access the collection.
-}
-finally {
-   Monitor::Exit(ic->SyncRoot);
-}
-```
-
- Retrieving the value of this property is an O(1) operation.
+Retrieving the value of this property is an O(1) operation.
 
  ]]></format>
         </remarks>