Compile and execute C# code at runtime

Add this assemblies

using System.CodeDom.Compiler;

using Microsoft.CSharp;

using System.Reflection;

string source = @"namespace NSTest

                              {

                                public class clstest

                                 {

                                      public string SayMyName(string Name)

                                      {

                                          return Name;

                                      }

                                 }

                              }";

Dictionary<string, string> providerOptions = new Dictionary<string, string>

 {

     {"CompilerVersion", "v3.5"}

 };

CSharpCodeProvider provider = new CSharpCodeProvider(providerOptions);

CompilerParameters compilerParams = new CompilerParameters

{

    GenerateInMemory = true,

    GenerateExecutable = false

};

/// add assembly runtime

compilerParams.ReferencedAssemblies.Add("System.Drawing.dll");

// Compile code

CompilerResults results = provider.CompileAssemblyFromSource(compilerParams, source);

// Check if code has any error ??                       

if (results.Errors.HasErrors)

 {

      StringBuilder error = new StringBuilder();

      foreach (CompilerError item in results.Errors)

      {

          error.AppendLine(item.ErrorText);

       }

       throw new Exception(error.ToString());

 }

// create instance of class using Reflection

object objClass = results.CompiledAssembly.CreateInstance("NSTest.clstest");

// Find method

MethodInfo objMI = objClass.GetType().GetMethod("SayMyName");

// Invoke method

string str = objMI.Invoke(objClass, new object[] { "Ajay" }).ToString();