Does it have to be in C#?
it's desirable C# but a trading framework created on other program languages (С,С++.Java) interesting too.
Does it have to be in C#?

I see you have some symptoms of a mild schizophrenia where I wrote "complain" that for me do not do custom solutions or do you really sure that all developers who using a open source is the parasites
It might be helpful to list the projects you have found and why they don't meet your needs so others can take that into account when making suggestions...I know it, but that's not completely true I mean open source libraries created other developers (Sort of the LEAN), I found a few projects, but they are have some problems in design for my work.
I think projects kind of the LEAN must be more dozen but I can't at the internet found not one list of open source trading platforms if do you have or know the list please will share it
Yeah now our talk going to the point, it is exactly what me need