/// <summary>
/// Creates a <see cref="Sandbox"/> object, compiled expressions and configures extensions inside the sandbox application domain.
/// </summary>
/// <param name="appDomain">The sandbox application domain.</param>
/// <param name="assemblyPath">The compiled expressions assembly path.</param>
/// <param name="extensions">The extensions to initialize the compiled expression object with.</param>
/// <returns>A remote <see cref="Sandbox"/> object.</returns>
private static Sandbox CreateSandbox(AppDomain appDomain, string assemblyPath, ExtensionCollection extensions)
{
var sandboxType = typeof(Sandbox);
var sandboxAssemblyPath = sandboxType.Assembly.ManifestModule.FullyQualifiedName;
var typeName = sandboxType.FullName;
Debug.Assert(typeName != null, "typeName != null");
var sandbox = (Sandbox)Activator.CreateInstanceFrom(appDomain, sandboxAssemblyPath, typeName).Unwrap();
var assemblyMap = new Dictionary<string, string>();
foreach (var type in extensions.Select(e => e.GetExtensionType()))
assemblyMap[type.Assembly.FullName] = type.Assembly.ManifestModule.FullyQualifiedName;
sandbox.InstallAssemblyResolver(assemblyMap);
sandbox.CreateCompiledExpressions(assemblyPath);
// Extensions
foreach (var extension in extensions)
sandbox.SetValue(extension.Name, extension.Instance);
return sandbox;
}