1.cs

[Binding]    
public class NUnit3Hooks    
{        
  [BeforeFeature("workingdirectory_feature")]        
  public static void ChangeWorkingDirectory()        
  {            
    FeatureContext.Current.Add("NUnit3Hooks.OldWorkingDirectory", Directory.GetCurrentDirectory());
    Directory.SetCurrentDirectory(TestContext.CurrentContext.TestDirectory);
  }
  [AfterFeature("workingdirectory_feature")]
  public static void RestoreWorkingDirectory()  
  {                     
    Directory.SetCurrentDirectory(FeatureContext.Current.Get("NUnit3Hooks.OldWorkingDirectory"));
  }
}