C# Eval

public class EvalClass
    {
        public static object Eval(string sCSCode)
        {
            CSharpCodeProvider c = new CSharpCodeProvider();
            ICodeCompiler icc = c.CreateCompiler();
            CompilerParameters cp = new CompilerParameters();

            cp.ReferencedAssemblies.Add("system.dll");
            cp.ReferencedAssemblies.Add("system.xml.dll");
            cp.ReferencedAssemblies.Add("system.data.dll");
            cp.ReferencedAssemblies.Add("system.windows.forms.dll");
            cp.ReferencedAssemblies.Add("system.drawing.dll");

            cp.CompilerOptions = "/t:library";
            cp.GenerateInMemory = true;
            StringBuilder sb = new StringBuilder("");

            sb.Append("using System;\n");
            sb.Append("using System.Xml;\n");
            sb.Append("using System.Data;\n");
            sb.Append("using System.Data.SqlClient;\n");
            sb.Append("using System.Windows.Forms;\n");
            sb.Append("using System.Drawing;\n");

            sb.Append("namespace CSCodeEvaler{ \n");
            sb.Append("public class CSCodeEvaler{ \n");
            sb.Append("public object EvalCode(){\n");
            sb.Append("return " + sCSCode + "; \n");
            sb.Append("} \n");
            sb.Append("} \n");
            sb.Append("}\n");

            CompilerResults cr = icc.CompileAssemblyFromSource(cp, sb.ToString());
            if (cr.Errors.Count > 0)
            {
                return null;
            }

            System.Reflection.Assembly a = cr.CompiledAssembly;
            object o = a.CreateInstance("CSCodeEvaler.CSCodeEvaler");
            Type t = o.GetType();
            MethodInfo mi = t.GetMethod("EvalCode");
            object s = mi.Invoke(o, null);
            return s;
        }
    }