c# - In string.Format escape user entered characters such as {0), {1} -


while sending smtp email getting following error:

index (zero based) must greater or equal 0 , less size of argument list.

this error happening because entry.rundescription has following user entered text characters confusing string.format method in email body.

pipettor ({0}) test ({1}) assay ({2}) pack ({3}) wedge ({4}) location ({5}) final position ({6}) maximum ({7})

since user entred text, there way make work besides adding logic user not enter these characters or how escape these characters , still retain text?

message.body = string.format(string.format("<html><body>- service request<br/> new service request in queue <br/> please use following link access details of service request <a href=\"{0}{1}\">{0}{1}</a> <br/>" + entry.rundescription + "thank <br/> administrator <br/></body></html>", servicerequesturl, entry.serviceentryid));

don't "add" user entered entry.rundescription string format string. instead add additional parameter it: 

message.body = string.format(" ... <br/>{2} ...",     servicerequesturl, entry.serviceentryid, entry.rundescription));

-

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