Scripting; C#; Script does not compile if if includes "#reference" directive or "using" statements

C# (C sharp) Scripts that included either a "#reference" directive or a "using" statement failed to compile.

Compile errors may include the following (or similar):

• Preprocessor directive expected
• Single-line comment or end-of-line expected
• Invalid token "using" in class, struct, or interface member declaration
• Invalid token ";" in class, struct, or interface member declaration

For example, the following Script code would not compile:

#reference "System.Core"

using System.Linq;

public bool Main(ISKeyValueList parameters) {
  // Assume Success
  bool Success = true;

  // Function should return a Boolean value indicating success
  return Success;
}

NOTE: LINQ support does not require any references or imports from version 4.00.03