CodeDom Sample

using System;
using System.CodeDom.Compiler;
using System.IO;
using Microsoft.CSharp;


namespace CodeDomTest
{
    class Program
    {
        static void Main()
        {
            string source1 = File.ReadAllText(@"Source path here");
            string source2 = File.ReadAllText(@"Source path here");
            var results = CompileCsharpSource(new[] { source1, source2 }, "App.exe");

            if (results.Errors.Count == 0)
                Console.WriteLine("No Errors");
            else
            {
                foreach (CompilerError error in results.Errors)
                    Console.WriteLine(error.ErrorText);
            }

            Console.ReadLine();
        }

        private static CompilerResults CompileCsharpSource(string[] sources, string output, params string[] references)
        {
            var parameters = new CompilerParameters(references, output);
            parameters.GenerateExecutable = true;
            using (var provider = new CSharpCodeProvider())
                return provider.CompileAssemblyFromSource(parameters, sources);
        }
    }
}