public static Assembly NewAssembly(){  //創建編譯器實例。    provider = new CSharpCodeProvider();  //設置編譯參數。    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");  //創建動態代碼。      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}");  //創建屬性。    /*************************在這里改成需要的屬性******************************/  classSource.Append(propertyString("aaa"));  classSource.Append(propertyString("bbb"));  classSource.Append(propertyString("ccc"));  classSource.Append("}");  System.Diagnostics.Debug.WriteLine(classSource.ToString());   //編譯代碼。    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;  }    //獲取編譯后的程序集。    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();}