diff --git a/xml/System.Threading/Timer.xml b/xml/System.Threading/Timer.xml
index c43052f9028..39d0abe5f19 100644
--- a/xml/System.Threading/Timer.xml
+++ b/xml/System.Threading/Timer.xml
@@ -857,15 +857,17 @@ Sub TimerCallback(state As Object)
         <returns>
           <see langword="true" /> if the timer was successfully updated; otherwise, <see langword="false" />.</returns>
         <remarks>
-          <format type="text/markdown"><![CDATA[
-
-## Remarks
- The callback method is invoked once after `dueTime` elapses, and thereafter each time the time interval specified by `period` elapses.
-
- If `dueTime` is <xref:System.TimeSpan.Zero?displayProperty=nameWithType>, the callback method is invoked immediately. If `dueTime` is <xref:System.Threading.Timeout.InfiniteTimeSpan>, the callback method is never invoked; the timer is disabled, but can be re-enabled by calling <xref:System.Threading.Timer.Change%2A> and specifying a positive value for `dueTime`.
-
- If `period` is <xref:System.TimeSpan.Zero?displayProperty=nameWithType> or <xref:System.Threading.Timeout.InfiniteTimeSpan>, and `dueTime` is positive, the callback method is invoked once; the periodic behavior of the timer is disabled, but can be re-enabled by calling <xref:System.Threading.Timer.Change%2A> and specifying a value greater than zero for `period`.
-
+          <format type="text/markdown"><![CDATA[  
+  
+## Remarks  
+ The callback method is invoked once after `dueTime` elapses, and thereafter each time the time interval specified by `period` elapses.  
+ 
+ If `period` value is provided in ticks, they have to be greater or equal to 1 millisecond. A tick value below 1 millisecond will be rounded down to zero (0).
+  
+ If `dueTime` is <xref:System.TimeSpan.Zero?displayProperty=nameWithType>, the callback method is invoked immediately. If `dueTime` is <xref:System.Threading.Timeout.InfiniteTimeSpan>, the callback method is never invoked; the timer is disabled, but can be re-enabled by calling <xref:System.Threading.Timer.Change%2A> and specifying a positive value for `dueTime`.  
+  
+ If `period` is <xref:System.TimeSpan.Zero?displayProperty=nameWithType> or <xref:System.Threading.Timeout.InfiniteTimeSpan>, and `dueTime` is positive, the callback method is invoked once; the periodic behavior of the timer is disabled, but can be re-enabled by calling <xref:System.Threading.Timer.Change%2A> and specifying a value greater than zero for `period`.  
+  
  The <xref:System.Threading.Timer.Change%2A> method can be called from the <xref:System.Threading.TimerCallback> delegate.
 
 ## Examples