Updated Helpers.cs tryReadFile method so that it handles exceptions that may happen, without crashing the program.

[spliffli]

Updated the tryReadFile method so that it handles some exceptions and I ran into all 3 of these exceptions while building upon this code in another project and thought it might be worth contributing.

Because the tryReadFile method frequently gets called from a loop for checking for a file at a given path, returning an empty string after handling each exception means it will just try again at the next loop and operate smoothly without crashing the program.

• DirectoryNotFoundException can happen when the MetaTrader EA either isn't running or isn't initialized properly, and it returns an empty string to continue the loop that's constantly checking a filepath until it either works or possibly it can be updated to infer the status of the EA as offline which could be useful.

• FileNotFoundException was happening in my program even when the EA was running, and I found that by creating an empty file at location where it's expected to be fixes the problem, so it does that and returns an empty string.

• IOException happens when more than one process accesses the same resource at the exact same time a.k.a. a race condition. This can be handled by just returning an empty string.

[spliffli]

By the way, sorry for doing so many commits after I opened the pull request. It's because as I was editing the file in this repo directly on github, I improvised a new method to get the file name from a filepath so it can write that to the console when there's an exception, and I forgot to add the var keyword.

Feel free to edit the Console.WriteLine statements since I know you use a helper method called print for writing to the console.

Also, if you want me to instead open a different pull request on the developer branch instead of the main branch I can do that.