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();
}