Dotfuscator Community edition is allowed for non-commercial use only. My english is not so good. Please, correct my errors. Best regards, Alexey.

Thanks. My english is not so good. Please, correct my errors. Best regards, Alexey.

With! "Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

In C# you cannot do this mistake, since any expression evaluted in an if statement must be boolean. So if you write: if (count = 1) {...} The compiler will error. The only exception is when you write: if (flag = false) {...} or if (flag = true) {...} The compiler won't error for this, but from my point of view there is no reason to compare booleans with an equal sign. Just use if(!flag) or if(flag). Ami

No, you're wrong. I'm a lead programmer on C# in my organization. This can't depend on my skill, because it's a routine field of work, but I want more. And I think, that improvement of skills is continious process that come through your life. That's why I every day trying to do some "improvement". And this project must be improvmet too. And not only in programming. Best regards, A_l_e_x_e_y_.

Thank's for attention ! i've founded solution. It's simple: use of event PreviewKeyDown: private void OnPreviewKeyDown(object sender, PreviewKeyDownEventArgs e) { if (e.KeyCode == Keys.F5) { e.IsInputKey = true; } } Best regards, Alexey.

Thanks for this solution. Best regards, A_l_e_x_e_y_.