这个就是在程序中调用编译器···

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Reflection;
using Microsoft.CSharp;
using Microsoft.Internal;
using Evaluator;
using System.Globalization;
using System.CodeDom;
using System.CodeDom.Compiler;

namespace xmlPathTest
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void btnAddNodes_Click(object sender, EventArgs e)
        {
            // 1.CSharpCodePrivoder
            CSharpCodeProvider objCSharpCodePrivoder = new CSharpCodeProvider();
            // 2.ICodeComplier
            ICodeCompiler objICodeCompiler = objCSharpCodePrivoder.CreateCompiler();
            // 3.CompilerParameters
            CompilerParameters objCompilerParameters = new CompilerParameters();
            objCompilerParameters.ReferencedAssemblies.Add("System.dll");       
            objCompilerParameters.ReferencedAssemblies.Add("System.Windows.Forms.dll");
            objCompilerParameters.ReferencedAssemblies.Add("System.Data.dll");
            objCompilerParameters.ReferencedAssemblies.Add("System.Drawing.dll");
            objCompilerParameters.ReferencedAssemblies.Add("System.Xml.dll");
            objCompilerParameters.ReferencedAssemblies.Add("xmlPathTest.exe");
            objCompilerParameters.GenerateExecutable = false;
            objCompilerParameters.GenerateInMemory = true;
            // 4.CompilerResults
            CompilerResults cr = objICodeCompiler.CompileAssemblyFromSource(objCompilerParameters, CreateCode(txtFrmName.Text.Trim()));
            if (cr.Errors.HasErrors)
            {
                richTextBox1.Text = "编译错误：\r\n";
                foreach (CompilerError err in cr.Errors)
                {
                    richTextBox1.Text += err.ErrorText + "\r\n";
                }
            }
            else
            {
                // 通过反射，调用HelloWorld的实例
                Assembly objAssembly = cr.CompiledAssembly;
                object objHelloWorld = objAssembly.CreateInstance("xmlPathTest.HelloWorld");
                MethodInfo objMI = objHelloWorld.GetType().GetMethod("OutPut");
               objMI.Invoke(objHelloWorld, null);
            }
        }    
        private string CreateCode(string frmName)
        {
            StringBuilder sb = new StringBuilder();
            sb.Append("using System;");
            sb.Append(Environment.NewLine);
            sb.Append("using System.Collections.Generic;");
            sb.Append(Environment.NewLine);
            sb.Append("using System.ComponentModel;");
            sb.Append(Environment.NewLine);
            sb.Append("using System.Data;");
            sb.Append(Environment.NewLine);
            sb.Append("using System.Drawing;");
            sb.Append(Environment.NewLine);
            sb.Append("using System.Text;");
            sb.Append(Environment.NewLine);
            sb.Append("using System.Windows.Forms;");
            sb.Append(Environment.NewLine);
            sb.Append("namespace xmlPathTest");
            sb.Append(Environment.NewLine);
            sb.Append("{");
            sb.Append(Environment.NewLine);
            sb.Append("      public class HelloWorld");
            sb.Append(Environment.NewLine);
            sb.Append("      {");
            sb.Append(Environment.NewLine);
            sb.Append("          public void OutPut()");
            sb.Append(Environment.NewLine);
            sb.Append("          {");
            sb.Append(Environment.NewLine);
            sb.AppendFormat("               new xmlPathTest.{0}().Show();",frmName);
            sb.Append(Environment.NewLine);
            sb.Append("          }");
            sb.Append(Environment.NewLine);
            sb.Append("      }");
            sb.Append(Environment.NewLine);
            sb.Append("}");
            richTextBox1.Text = sb.ToString();
            return sb.ToString();
           
        }
    }
}