RuntimeCodeCompiler

using System;
using System.CodeDom.Compiler;
using System.Reflection;
using System.Text;

namespace DPlot
{
    public static class RuntimeCodeCompiler
    {
        const string ScriptPrefix = @"
using System;
using Replotter;

public static class Script
{
    public static void Main(this CommandContext ctx)
    {
";
        const string ScriptSufix = @"
    }
}";

        public static Assembly CompileCode(string code, out string compilerOutput)
        {
            Assembly assembly = null;
            compilerOutput = "";
            try {

                    var provider = CodeDomProvider.CreateProvider("CSharp");

                    var cp = new CompilerParameters {
                        GenerateExecutable = false,
                        GenerateInMemory = true,
                        TreatWarningsAsErrors = false
                    };

                    // Add references to all the assemblies we might need.
                    var executingAssembly = Assembly.GetExecutingAssembly();
                    cp.ReferencedAssemblies.Add(executingAssembly.Location);
                    cp.ReferencedAssemblies.Add("System.Core.dll");
                    cp.ReferencedAssemblies.Add("System.dll");
                    //foreach (AssemblyName assemblyName in executingAssembly.GetReferencedAssemblies())
                        //cp.ReferencedAssemblies.Add(Assembly.Load(assemblyName).Location);

                    // Invoke compilation of the source file.
                    var cr = provider.CompileAssemblyFromSource(cp, ScriptPrefix + code + ScriptSufix);

                    if (cr.Errors.Count > 0) {
                        // Display compilation errors.
                        StringBuilder builder = new StringBuilder();
                        foreach (CompilerError ce in cr.Errors) {
                            builder.Append(ce.ToString());
                            builder.Append("\n");
                        }
                        compilerOutput = builder.ToString();
                    }
                    else
                        assembly = cr.CompiledAssembly;
            }
            catch (Exception e) {
                compilerOutput = e.ToString();
            }
            return assembly;
        }
    }
}