Current thread must be set to single thread apartment (STA) mode before OLE,当前线程不在单线程单元中，因此无法实例化 ActiveX 控件“8856f961-340a-11d0-a96b-00c04fd705a2”。

Add the STAThreadAttribute attribute on the Main method. This attribute is required if your program access OLE related functions, like Clipboard class does.

[STAThread]
static void Main(string[] args)
{
}

使用以下方式
var t = new Thread(MyThreadStartMethod);
t.SetApartmentState(ApartmentState.STA);
t.Start();
或者

th = new System.Threading.Thread(new System.Threading.ThreadStart(
() =>
{
Start.Run();
}));

th.SetApartmentState(ApartmentState.STA);
th.Start();
能解决

　　参考;http://blog.sina.com.cn/s/blog_891b90e90101c4vq.html