I would like to run my test cases in parallel, using specflow+ in C#. I came across Memory Isolation(App Domain).
Any ideas on implementing this are appreciated!
Please have a look at this blog post about configuring the parallel execution: https://the-engineers.net/2016/04/08/using-specflowrunners-parallelization-features/
As long as you have no problems with your shared resources, you do not need to implement anything to run the tests in parallel.
Full disclosure: I am one of the developers of SpecFlow+.