FIX Misunderstanding about instantiating an abstract class. (#9508)

Author: Brianmanden

xml/System.IO/TextWriter.xml

@@ -101,7 +101,7 @@
       <format type="text/markdown"><![CDATA[  
   
 ## Remarks  
- <xref:System.IO.TextWriter> is the abstract base class of <xref:System.IO.StreamWriter> and <xref:System.IO.StringWriter>, which write characters to streams and strings, respectively. Create an instance of <xref:System.IO.TextWriter> to write an object to a string, write strings to a file, or to serialize XML. You can also use an instance of <xref:System.IO.TextWriter> to write text to a custom backing store using the same APIs you would use for a string or a stream, or to add support for text formatting.  
+ <xref:System.IO.TextWriter> is the abstract base class of <xref:System.IO.StreamWriter> and <xref:System.IO.StringWriter>, which write characters to streams and strings, respectively. Use an instance of <xref:System.IO.TextWriter> to write an object to a string, write strings to a file, or to serialize XML. You can also use the instance of <xref:System.IO.TextWriter> to write text to a custom backing store using the same APIs you would use for a string or a stream, or to add support for text formatting.  
   
  All the `Write` methods of <xref:System.IO.TextWriter> having primitive data types as parameters write out the values as strings.