Compile and call JavaScript code from .NET (C#). Opens up the possibility to use for example ClojureScript core.logic as a rule engine in C# business applications.

CSharpCallingJavascript.cs

using System;
using System.CodeDom.Compiler;
using Microsoft.JScript;

namespace JavascriptFromDotNet
{
    class Program
    {
        private const string Source = @"
package Test 
{ 
  class HelloWorld 
  { 
    function Hello(name) { return ""Hello, "" + name; }
  }
}";
        
        static void Main(string[] args)
        {
            var provider = new JScriptCodeProvider();
            var compiler = provider.CreateCompiler();
            var parameters = new CompilerParameters {GenerateInMemory = true};
            var results = compiler.CompileAssemblyFromSource(parameters,Source);
            var assembly = results.CompiledAssembly;
            dynamic instance = Activator.CreateInstance(assembly.GetType("Test.HelloWorld"));
            var result = instance.Hello("World");
            Console.WriteLine("Result: {0}", result);
        }
    }
}