replace commas in string with line breaks and send email in html format

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C#

ASP.NET

i have a long string which has comma seperated values in it.i want to replace commas with line breaks and send it in e mail.i m using the following code to replace commas by line breaks.

string replce = Regex.Replace(bodystr, ",", Environment.NewLine);

But in email it doesnt show line breaks..for example if my original string is "abc,bcd"
in email it displays as abc bcd. i need to display them as..
abc
bcd..how to do it?Help Me...