Newbie Question on .net APIs

I have done a fair amount of online trading but would like to get into program driven automatic trading. Which brokers support an .NET compatible API for home grown software?

Thanks

 

Interactive Brokers has a decent API. I've written some things in C# using their ActiveX component without much difficulty.

 

MB Trading has COM controls and C# wrapper example. It is very easy to use.

 

there search button at right upper corner. type API into "search by keyword" text box.read.

http://www.elitetrader.com/vb/search.php?s=