This looks really good and clean to me as well, but I too come from a C# Background.

I think there are only a couple of things missing that I would personally like to see myself.

1. Error Handling
2. Constructor

there is only one thing that I would probably change.

your BuildCommand Function should not Execute the command. I think that should be called inside of the execute function before you actually execute the function, it works, but it doesn't look right to me personally and if you leave it like this you should change the name of the function to something like

This looks really good and clean to me as well, but I too come from a C# Background.

I think there are only a couple of things missing that I would personally like to see myself.

1. Error Handling
2. Constructor

there is only one thing that I would probably change.

your BuildCommand Function should not open the connection. I think that the open and close should be done in the Execute functions.