asp.net regular exprssion Max char with not in condition
<p>I have my regular expression as ValidationExpression="^[^&lt;>]<em>$"
I want to add number of char it will accept. 
say for example i want to  limit my textbox(multiline) length to 200.
how to achieve.
I tried  ValidationExpression="^[^&lt;>]</em>{0, 200}$" but its not working.
what is the solution></p>
