动态加载dll

string   DllPath   =   Application.StartupPath   +   @ "\someDLL.dll "; 

System.Reflection.Assembly   assmble   =   System.Reflection.Assembly.LoadFile(DllPath); 

Type   tmpType   =   assmble.GetType( "someDLL.ClassA "); 

System.Reflection.MethodInfo   tmpM   =   tmpType.GetMethod( "Add "); 

object   tmpobj   =   assmble.CreateInstance( "someDLL.ClassA "); 

int   i   =   (int)tmpM.Invoke(tmpobj,   new   object[]{2,3}); 

－－－－－－－－－－ClassA的定义-------------------- 

using   System; 

namespace   someDLL 

{ 

///   <summary> 

///   ClassA   的摘要说明。 

///   </summary> 

public   class   ClassA 

{ 

public   ClassA() 

{ 

// 

//   TODO:   在此处添加构造函数逻辑 

// 

} 

public   int   Add(int   a,   int   b) 

{ 

return   a+b; 

} 

} 

}