利用反射动态调用IService 接口的方法

//方式一：使用 InvokeMember关键字，性能一般
/// <summary>
/// 验证数据字典是否有效
/// </summary>
/// <typeparam name="T">操作类</typeparam>
/// <typeparam name="S">查找类</typeparam>
/// <typeparam name="R">结果类</typeparam>
/// <param name="pObj"></param>
/// <returns></returns>
public virtual bool ValidDict<T, S, R>(string pFuncName, S pObj)
{
    T instance = Activator.CreateInstance<T>();
    object[] mParam = new object[] { pObj };
    IList<R> mResult = (IList<R>)instance.GetType().InvokeMember(String.IsNullOrEmpty(pFuncName) ? "SelectByFields" : 
           pFuncName,System.Reflection.BindingFlags.InvokeMethod, null, instance, mParam);
    return mResult.Count > 0;
}

//Linq 结合 Delegate
from method in typeof( Classy ).GetMethods( BindingFlags.Instance | BindingFlags.DeclaredOnly | BindingFlags.NonPublic )
let delegateType = typeof(classyDelegate<,>)
select Delegate.CreateDelegate( delegateType, yourInstance, method)
来源：http://stackoverflow.com/questions/2714989/delegate-createdelegate-and-generics-error-binding-to-target-method

//===================================================
//方式二：使用 Delegate.CreateDelegate关键字，性能很好
public IList<Campaign> GetSimbaCampaigns(string nick)
{
    //TODO: 动态调用方法
}

//调用方法如下：
MethodInfo mi = this.GetType().GetMethod(methodName); //.MakeGenericMethod(typeof(MyClass)); methodName=“GetSimbaCampaigns”
var del = Delegate.CreateDelegate(typeof(Func<string, IList<Campaign>>), this, mi);
var obj = (IList<Campaign>)del.DynamicInvoke(objs);

//===================================================
//方式三：使用 dynamic关键字，性能较好
dynamic dync = new TopTaobaoHelper();
dync.GetSimbaCampaigns(objs);