private static void TestMethod()
{
//dynamic 仅仅是个占位符而已
dynamic p1 = new { X = , Y = };
//对dynamic对象p1的X属性访问通过CallSite来实现，并且CallSite可以Cache
object p1x = p1.X;
object p1y = p1.Y; //dynamic 仅仅是个占位符而已
dynamic p2 = new { X = , Y = , Z = };
object p2x = p2.X;
object p2y = p2.Y;
object p2z = p2.Z; }
对于如上所示的含有dynamic调用的C#方法编译后大致的结果如下：
using System;
using Microsoft.CSharp.RuntimeBinder;
using System.Runtime.CompilerServices; private static void TestMethod()
{
object p1 = new {
X = ,
Y = 0x59
}; if (TestMethod_SiteContainer.p_Sitea == null)
{
TestMethod_SiteContainer.p_Sitea = CallSite<Func<CallSite, object, object>>.Create(Binder.GetMember(CSharpBinderFlags.None, "X", typeof(Program), new CSharpArgumentInfo[] { CSharpArgumentInfo.Create(CSharpArgumentInfoFlags.None, null) }));
}
object p1x = TestMethod_SiteContainer.p_Sitea.Target(TestMethod_SiteContainer.p_Sitea, p1); if (TestMethod_SiteContainer.p_Siteb == null)
{
TestMethod_SiteContainer.p_Siteb = CallSite<Func<CallSite, object, object>>.Create(Binder.GetMember(CSharpBinderFlags.None, "Y", typeof(Program), new CSharpArgumentInfo[] { CSharpArgumentInfo.Create(CSharpArgumentInfoFlags.None, null) }));
}
object p1y = TestMethod_SiteContainer.p_Siteb.Target(TestMethod_SiteContainer.p_Siteb, p1); object p2 = new {
X = ,
Y = 0x59,
Z =
}; if (TestMethod_SiteContainer.p_Sitec == null)
{
TestMethod_SiteContainer.p_Sitec = CallSite<Func<CallSite, object, object>>.Create(Binder.GetMember(CSharpBinderFlags.None, "X", typeof(Program), new CSharpArgumentInfo[] { CSharpArgumentInfo.Create(CSharpArgumentInfoFlags.None, null) }));
}
object p2x = TestMethod_SiteContainer.p_Sitec.Target(TestMethod_SiteContainer.p_Sitec, p2); if (TestMethod_SiteContainer.p_Sited == null)
{
TestMethod_SiteContainer.p_Sited = CallSite<Func<CallSite, object, object>>.Create(Binder.GetMember(CSharpBinderFlags.None, "Y", typeof(Program), new CSharpArgumentInfo[] { CSharpArgumentInfo.Create(CSharpArgumentInfoFlags.None, null) }));
}
object p2y = TestMethod_SiteContainer.p_Sited.Target(TestMethod_SiteContainer.p_Sited, p2); if (TestMethod_SiteContainer.p_Sitee == null)
{
TestMethod_SiteContainer.p_Sitee = CallSite<Func<CallSite, object, object>>.Create(Binder.GetMember(CSharpBinderFlags.None, "Z", typeof(Program), new CSharpArgumentInfo[] { CSharpArgumentInfo.Create(CSharpArgumentInfoFlags.None, null) }));
}
object p2z = TestMethod_SiteContainer.p_Sitee.Target(TestMethod_SiteContainer.p_Sitee, p2);
} [CompilerGenerated]
private static class TestMethod_SiteContainer
{
// Fields
public static CallSite<Func<CallSite, object, object>> p_Sitea;
public static CallSite<Func<CallSite, object, object>> p_Siteb;
public static CallSite<Func<CallSite, object, object>> p_Sitec;
public static CallSite<Func<CallSite, object, object>> p_Sited;
public static CallSite<Func<CallSite, object, object>> p_Sitee;
}