Make internal classes visible to other assemblies

I've just uploaded a new beta that allows this to work.

Add the following attribute to the libraries whose internals you want LINQPad to access:

[assembly: InternalsVisibleTo("LINQPadQuery")]

You'll also need to enable this feature in LINQPad's preferences (Edit | Preferences | Advanced).

Let me know how you get along.

You can also go to the project properties into AssemblyInfo.cs file and set it there.

For example:

using System.Reflection;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;

// General Information about an assembly is controlled through the following 
// set of attributes. Change these attribute values to modify the information
// associated with an assembly.
[assembly: AssemblyTitle("*****)]
[assembly: AssemblyDescription("")]
[assembly: AssemblyConfiguration("")]
[assembly: AssemblyCompany("*****")]
[assembly: AssemblyProduct("*****")]
[assembly: AssemblyCopyright("")]
[assembly: AssemblyTrademark("")]
[assembly: AssemblyCulture("")]
[assembly: InternalsVisibleTo("[HERE IS YOUR ASSEMBLY WHERE YOU WANT TO SEE INTERNALS OF CURRENT ASSEMBLY")]

// Setting ComVisible to false makes the types in this assembly not visible 
// to COM components.  If you need to access a type in this assembly from 
// COM, set the ComVisible attribute to true on that type.
[assembly: ComVisible(false)]

// The following GUID is for the ID of the typelib if this project is exposed to COM
[assembly: Guid("6fbd2c14-031d-48cc-9cc6-f1b85d701e89")]

// Version information for an assembly consists of the following four values:
//
//      Major Version
//      Minor Version 
//      Build Number
//      Revision
//
// You can specify all the values or you can default the Build and Revision Numbers 
// by using the '*' as shown below:
// [assembly: AssemblyVersion("1.0.*")]
[assembly: AssemblyVersion("1.0.0.0")]
[assembly: AssemblyFileVersion("1.0.0.0")]