Roslyn: C# Interactive does not see System.Xml with IntelliSense

[shaggygi]

Visual Studio 2015 Update 3

Steps to Reproduce:

1. Open C# Interactive
2. Type in using System.Xml

Expected Behavior:
Should be able to reference the namespace as it worked before updating to VS 2015 Update 3.

Actual Behavior:
It works after referencing the API with the following code:

r "C:Program Files (x86)Reference AssembliesMicrosoftFramework.NETFrameworkv4.6.1System.Xml.Linq.dll"

[shaggygi]

Understanding this issue wasn't assigned to a milestone, I wanted to give an updated that I noticed this still wasn't working in VS 2017 RC.

[tmat]

You don't need to use the full path, this is sufficient:

```C#

r "System.Xml.Linq"

```

[shaggygi]

Yep, that worked and good to know. Thx. It used to work by adding using System.Xml.Linq;. Is this coming back?

[tmat]

We have deliberately changed the set of references loaded by default to match csi.exe, so that all our interactive hosts have consistent configuration:

/r:System
/r:System.Core
/r:Microsoft.CSharp
/r:System.ValueTuple.dll  // this one is new in VS 2017
/u:System
/u:System.IO
/u:System.Collections.Generic
/u:System.Console
/u:System.Diagnostics
/u:System.Dynamic
/u:System.Linq
/u:System.Linq.Expressions
/u:System.Text
/u:System.Threading.Tasks

You can modify the configuration file:

{vs install dir}\Common7\IDE\PrivateAssemblies\CSharpInteractive.rsp

if you'd like to load more references or import more namespaces by default.
Unfortunately, we don't currently support this configuration to be specified on per-user basis, so you'll have to modify the settings per VS installation.

[shaggygi]

Oh, also good to know. In that case, I will go ahead and close this issue. Thx again for the details.

[tmat]

We have an issue tracking the per-user configuration if you are interested: https://github.com/dotnet/roslyn/issues/5976