Added the check if the process has exited to the synchronies process execution

Author: basicx-StrgV

src/WGet.NET/Components/Internal/ProcessManager.cs

@@ -118,6 +118,13 @@ private ProcessResult RunProcess(ProcessStartInfo processStartInfo)
 
                 //Wait till end and get exit code
                 proc.WaitForExit();
+
+                // Make sure the process has exited
+                if (!proc.HasExited)
+                {
+                    proc.Kill();
+                }
+
                 result.ExitCode = proc.ExitCode;
             }