duplicated .cake file

**Using VsCode 1.17 with C# 1.13.0-beta4**

I added the line
```cake
#load nuget:https://www.myget.org/F/cake-contrib/api/v2?package=Cake.Recipe&prerelease
```
in a `.cake` file.

Running it the first time worked.

After that, I continued to edit the file.
When I hit Ctrl+Space to get intellisense I noticed another directory of `Cake.Recipe` was downloaded.

Before:

After:

The complete cake script:
```cake
#load nuget:https://www.myget.org/F/cake-contrib/api/v2?package=Cake.Recipe&prerelease

Environment.SetVariableNames();

BuildParameters.SetParameters(context: Context,
buildSystem: BuildSystem,
sourceDirectoryPath: "./src",
title: "Cake.Openshift",
repositoryOwner: "cake-contrib",
repositoryName: "Cake.Openshift",
appVeyorAccountName: "cakecontrib");

BuildParameters.PrintParameters(Context);

ToolSettings.SetToolSettings(context: Context);

Build.RunDotNetCore();
```

It downloaded another copy of `Cake.Recipe` only when my cursor was in the method `BuildParameters.SetParameters` to get more details about more arguments for the method

Then I get the following error: