Checks whether supports a .NET type by Switcher is not appropriate

[zhoupan]

It is more appropriate to let the specific engine decide whether supports a .NET type.
see: https://microsoft.github.io/ClearScript/Examples/Examples.html

// create a script engine
using (var engine = new V8ScriptEngine())
{
    // expose a host type
    engine.AddHostType("Console", typeof(Console));
    engine.Execute("Console.WriteLine('{0} is an interesting number.', Math.PI)");
    // expose a host object
    engine.AddHostObject("random", new Random());
    engine.Execute("Console.WriteLine(random.NextDouble())");
    // expose entire assemblies
    engine.AddHostObject("lib", new HostTypeCollection("mscorlib", "System.Core"));
    engine.Execute("Console.WriteLine(lib.System.DateTime.Now)");
}

/// <summary>
/// Validation helpers
/// </summary>
public static class ValidationHelpers
{
	/// <summary>
	/// List of supported types
	/// </summary>
	private static readonly Type[] _supportedTypes =
	{
		typeof(Undefined), typeof(Boolean), typeof(Int32), typeof(Double), typeof(String)
	};
}

[Taritsyn]

Hello, Zhoupan!

Have you tried the EmbedHostObject and EmbedHostType methods? EmbedHostObject method only have an explicit restriction for the DateTime type.

It is more appropriate to let the specific engine decide whether supports a .NET type.

Remember the main purpose of this library:

JavaScript Engine Switcher determines unified interface for access to the basic features of popular JavaScript engines (…). This library allows you to quickly and easily switch to using of another JavaScript engine.

[zhoupan]

Thank you for your help.
EmbedHostObject and EmbedHostType works.