programatically add attachment in custom list in sharepoint 2010

i have registered ItemAttachmentAdded in my custom lis开发者_运维问答t.can anyone send me some code how can i add attachment in custom list.

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Google told me how to do it:

http://msdn.microsoft.com/en-us/library/microsoft.sharepoint.spattachmentcollection.add.aspx

byte[] fileData = GetFileData();
SPContext.Current.Web.Lists["My List"].Items[0].Attachments.Add("filename", fileData)