Improved documentation when the constructor is called with value 0 (#9544)

Author: vdekercd

xml/System.Runtime/MemoryFailPoint.xml

@@ -64,7 +64,7 @@
   
  To use a memory gate, you must create a <xref:System.Runtime.MemoryFailPoint> object and specify the number of megabytes (MB) of memory that the next operation is expected to use. If enough memory is not available, an <xref:System.InsufficientMemoryException> exception is thrown.  
   
- The parameter of the constructor must be a positive integer. A negative value raises an <xref:System.ArgumentOutOfRangeException> exception.  
+ The parameter of the constructor must be a positive integer. A negative value or 0 raises an <xref:System.ArgumentOutOfRangeException> exception.  
   
  <xref:System.Runtime.MemoryFailPoint> operates at a granularity of 16 MB. Any values smaller than 16 MB are treated as 16 MB, and other values are treated as the next largest multiple of 16 MB.  
   
@@ -136,7 +136,7 @@
   
  ]]></format>
         </remarks>
-        <exception cref="T:System.ArgumentOutOfRangeException">The specified memory size is negative.</exception>
+        <exception cref="T:System.ArgumentOutOfRangeException">The specified memory size is negative or 0.</exception>
         <exception cref="T:System.InsufficientMemoryException">There is insufficient memory to begin execution of the code protected by the gate.</exception>
       </Docs>
     </Member>