How to handle messages with an attachment?

[jay2deguzman]

When trying to send a message with an attachment, im getting an error exception, how can i handle this?

` if (activity.Type == ActivityTypes.Message)
{
try
{
await Conversation.SendAsync(activity, MakeRoot);
}
catch (Exception ex)
{

            }
        }`

Exception: The remote server returned an error: (400) Bad Request.
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