By design, Microsoft Visual Studio 2005 automatically executes code in the Load event of a user-defined control (UserControl1_Load function), which allows user-assisted attackers to execute arbitrary code by tricking the user into opening a malicious Visual Studio project file.
https://exchange.xforce.ibmcloud.com/vulnerabilities/24116
http://www.vupen.com/english/advisories/2006/0151
http://www.securityfocus.com/archive/1/421943/100/0/threaded