Generating class through C# code

namespace killercodes_in.CodeGeneration
{
    public class GenerateClass
    {
        public void Generate()
        {
            //output file name
            string fileName = "HelloWorld.cs";

            //text writer to write the code
            TextWriter tw = new StreamWriter(new FileStream(fileName, FileMode.Create));

            //code generator and code provider
            ICodeGenerator codeGenerator = new CSharpCodeProvider().CreateGenerator();
            CSharpCodeProvider cdp = new CSharpCodeProvider();
            codeGenerator = cdp.CreateGenerator();

            //namespace and includes
            CodeNamespace Samples = new CodeNamespace("Samples");
            Samples.Imports.Add(new CodeNamespaceImport("System"));

            //declare a class
            CodeTypeDeclaration Class1 = new CodeTypeDeclaration("HelloWorld");
            Samples.Types.Add(Class1);
            Class1.IsClass = true;

            //reference to a method - writeHelloWorld
            CodeMethodReferenceExpression Method1Ref = new CodeMethodReferenceExpression();
            Method1Ref.MethodName = "writeHelloWorld";
            CodeMethodInvokeExpression mi1 = new CodeMethodInvokeExpression();
            mi1.Method = Method1Ref;

            //constructor for the class
            CodeConstructor cc = new CodeConstructor();
            cc.Attributes = MemberAttributes.Public;
            cc.Statements.Add(mi1);
            Class1.Members.Add(cc);

            //method - writeHelloWorld
            CodeMemberMethod Method1 = new CodeMemberMethod();
            Method1.Name = "writeHelloWorld";
            Method1.ReturnType = new CodeTypeReference(typeof(void));
            //Method1.Parameters.Add(new CodeParameterDeclarationExpression(typeof(string), "text"));
            CodeMethodInvokeExpression cs1 = new CodeMethodInvokeExpression(new CodeTypeReferenceExpression("System.Console"), "WriteLine", new CodePrimitiveExpression("Hello World!!"));
            Method1.Statements.Add(cs1);
            Class1.Members.Add(Method1);

            //method - Main
            CodeEntryPointMethod Start = new CodeEntryPointMethod();
            Start.Statements.Add(new CodeSnippetStatement("HelloWorld hw = new HelloWorld();"));
            Class1.Members.Add(Start);

            //generate the source code file
            codeGenerator.GenerateCodeFromNamespace(Samples, tw, null);

            //close the text writer
            tw.Close();

            RunClass sampleRun = new RunClass();
        }
    }
}