檢核程式為單一應用

該程式碼為檢核程序是否為單一實例

System.Diagnostics.Process process = Process.GetCurrentProcess();

if (System.Diagnostics.Process.GetProcessesByName(process.ProcessName).Any(a => a.ProcessName == process.ProcessName && a.Id != process.Id))
{
	Console.WriteLine("Another instance of the application is already running.");
	return;
}