To handle correctly “notify” option you can do the following: 1) add an {YourFileName}.aspx into your Asp.Net Web Application. Where {YourFileName} – is the name of your .aspx file. 2) Put this code into {YourFileName}.aspx Please, note the ValidateRequest=”false” is required, because of the Asp.Net security system doesn’t let to post xml by default. Read more
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