Is there any way to download Windows updates programmatically from within a C# application? I want to manage the installation of updates from within my application.
The Windows Update API is documented here. A quick stackoverflow search has convinced me that you can indeed use COM from C# so this should solve your problem.
I also have some sample code, not in C#, but it may give you a head start in understanding how the interfaces can be used.
来源：https://stackoverflow.com/questions/7958803/download-windows-updates-using-c-sharp