C# windows service question

Question

I am a web developer who has not worked with windows development for many years.  I suddenly have to change a windows service.  
The windows service reads EDI files.  I want to check for the existence of a row in a SQL table at the beginning of the code.  If the row does not exist, then I want to stop processing the current EDI file and move on to the next file.  I already
have the code to check for the existence of the row.  My question is:  Is there an easy way to end processing of this file and move on the next file?

Answer 1

If the code is poorly written, you might be better of rewriting it  Personally
I always find my own code poorly written because I often code too linear and the code does not 'jump' from method to method 
Assuming that your code is basically single threaded (only processing one file at a time), you can keep a bool in the Program class to indicate if you want
to continue.
static class Program
public static bool WantToBailout=false;
static void Main()
You can set and check this everywhere in the existing code
private void someMethod()
if(Program.WantToBailout)
return;
// normal processing
if(!rowcheck())
Program.WantToBailout=true;
return;
private void anotherMethod()
if(Program.WantToBailout)
return;
someMethod();
if(Program.WantToBailout)
return;