C#在运行时动态创建类型

public static Assembly NewAssembly()        {            //创建编译器实例。               PRovider = new CSharpCodeProvider();            //设置编译参数。               cp = new CompilerParameters();            cp.GenerateExecutable = false;            cp.GenerateInMemory = true;            // Generate an executable instead of             // a class library.            //cp.GenerateExecutable = true;            // Set the assembly file name to generate.            cp.OutputAssembly = "c://1.dll";            // Generate debug information.            cp.IncludeDebugInformation = true;            // Save the assembly as a physical file.            cp.GenerateInMemory = false;            // Set the level at which the compiler             // should start displaying warnings.            cp.WarningLevel = 3;            // Set whether to treat all warnings as errors.            cp.TreatWarningsAsErrors = false;            // Set compiler argument to optimize output.            cp.CompilerOptions = "/optimize";            cp.ReferencedAssemblies.Add("System.dll");            //cp.ReferencedAssemblies.Add("System.Core.dll");            cp.ReferencedAssemblies.Add("System.Data.dll");            //cp.ReferencedAssemblies.Add("System.Data.DataSetExtensions.dll");            cp.ReferencedAssemblies.Add("System.Deployment.dll");            cp.ReferencedAssemblies.Add("System.Design.dll");            cp.ReferencedAssemblies.Add("System.Drawing.dll");            cp.ReferencedAssemblies.Add("System.Windows.Forms.dll");            //创建动态代码。                           StringBuilder classSource = new StringBuilder();            classSource.Append("using System;using System.Windows.Forms;/npublic   class   DynamicClass: UserControl /n");            classSource.Append("{/n");            classSource.Append("public DynamicClass()/n{/nInitializeComponent();/nConsole.WriteLine(/"hello/");}/n");            classSource.Append( "private System.ComponentModel.IContainer components = null;/nprotected override void Dispose(bool disposing)/n{/n");            classSource.Append( "if (disposing && (components != null)){components.Dispose();}base.Dispose(disposing);/n}/n");            classSource.Append( "private void InitializeComponent(){/nthis.SuspendLayout();this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);");            classSource.Append( "this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;this.Name = /"DynamicClass/";this.Size = new System.Drawing.Size(112, 74);this.ResumeLayout(false);/n}");            //创建属性。               /*************************在这里改成需要的属性******************************/            classSource.Append(propertyString("aaa"));            classSource.Append(propertyString("bbb"));            classSource.Append(propertyString("ccc"));            classSource.Append("}");            System.Diagnostics.Debug.WriteLine(classSource.ToString());                      //编译代码。               CompilerResults result = provider.CompileAssemblyFromSource(cp, classSource.ToString());            if (result.Errors.Count > 0)            {                for( int i = 0; i < result.Errors.Count; i ++)                    Console.WriteLine(result.Errors[ i]);                Console.WriteLine("error");                return null;            }                        //获取编译后的程序集。               Assembly assembly = result.CompiledAssembly;            return assembly;        }        private static string propertyString(string propertyName)        {            StringBuilder sbProperty = new StringBuilder();            sbProperty.Append(" private   int   _" + propertyName + "   =   0;/n");            sbProperty.Append(" public   int   " + "" + propertyName + "/n");            sbProperty.Append(" {/n");            sbProperty.Append(" get{   return   _" + propertyName + ";}   /n");            sbProperty.Append(" set{   _" + propertyName + "   =   value;   }/n");            sbProperty.Append(" }");            return sbProperty.ToString();        }