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I have used (@"[~`!@#$%^&*()-+=|\{}':;.,<>/?]"); this special character to email.
i use this ' special character given below exception throw
'System.Data.DataRowView' does not contain a property with the name

i use this < special character given below error throw
A potentially dangerous Request.Form value was detected from the client (ctl00$cphSiteMasterBody$tbxReRegisterRefNo="ghj<fh").

What I have tried:

i used regex regular expression to restrict these two special character but i want this characters also.
Updated 16-Sep-16 3:48am

Email addresses cannot contain '<' or '>' characters at any time: Email address - Wikipedia, the free encyclopedia[^]
Even then, the rules are different for the Local and Domain parts of the address "local@domain"
It clearly says that the domain part can only contain:
uppercase and lowercase Latin letters A to Z and a to z;
digits 0 to 9, provided that top-level domain names are not all-numeric;
hyphen -, provided that it is not the first or last character.
No other special characters are valid.
The local part is more flexible:
uppercase and lowercase Latin letters A to Z and a to z;
digits 0 to 9;
special characters !#$%&'*+-/=?^_`{|}~;
dot ., provided that it is not the first or last character unless quoted, and provided also that it does not appear consecutively unless quoted (e.g. is not allowed but "John..Doe" is allowed);
space and "(),:;<>@[\] characters are allowed with restrictions (they are only allowed inside a quoted string, as described in the paragraph below, and in addition, a backslash or double-quote must be preceded by a backslash);
comments are allowed with parentheses at either end of the local-part; e.g. john.smith(comment) and (comment) are both equivalent to

If you are talking about the message body, then generally speaking '<' and '>' will delimit HTML formatting data which is normally permitted - but any other use of such characters must replace them with &lt; and &gt; respectively in order to show them as < and > when the user reads the mail.
Raja Ganapathy 16-Sep-16 7:49am
if i used rj' throw the above exception
Afzaal Ahmad Zeeshan 16-Sep-16 15:24pm
Why would you want to use single qoute in your email address? Keep it alphanumeric only. Period.

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