IDisposable

disposable.cs

// ref: https://stackoverflow.com/a/538238/3367974
public class Foo : IDisposable
{
  protected void Dispose(Boolean disposing)
  {
    // free unmanaged resources
        
    if (disposing)  
    {    
      // free managed resources
    }
  }
  
  public void Dispose()
  {
     Dispose(true);
     // prevent GC calling finalize later
     GC.SuppressFinalize(this);
  }
  
  // add this if you have unmanaged resources
  ~Foo()
  {      
      Dispose(false);
  }
}