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博客园 - Vincent

reCaptcha 在UpdatePanel 和 ModalPopup中的使用 - Vincent Invalid character in a Base-64 string System.ArgumentOutOfRangeException at System.Web.HttpCachePolicy.UtcSetLastModified (DateTime utcDate) Microsoft will end OEM and shrink-wrapped sales of Windows XP on June 30, 2008 - Vincent My AutoCompleteExtender Windows Live Writer GRI-MindHarbor软件公司 单表继承 (Single Table Inheritance) 写给yzx110的一个实例,仅作参考! 很久没有写blog了. Base64 MD5加密 信用卡是超前消费的一种手段 vs.net2003无法打开*.xsd文件的解决方法 针对MS Project 2003 的开发 Test Your Knowledge of Microsoft Visual Studio .NET page event Microsoft Office InfoPath 2003 Toolkit for Visual Studio .NET 在Code-Behind中操作WebUserControl
Fabulous Adventures In Coding
Vincent · 2008-03-21 · via 博客园 - Vincent

Ayende在使用.Net 3.0的时候遇到了这样一个问题Csc.exe and delegate inference, or: Why C# has awkward syntax

public class TestCsc
{
public static void TestMethod()
{
Execute(Bar); 
// fail to compile
            Execute(delegate(int ia, string x) { }); // compiles fine
            Execute((int i, string x) => { return; }); // Compiles fine
            Execute((int i, string x) => { return true; }); // fail to compile
            Execute(Foo);// fail to compile
            Execute(delegate(int ia, string x) { return true; }); // fail to compile
        } public static bool Foo(int ia, string x)
{
return false;
public static void Bar(int ia, string x)
{
public static void Execute<T, K>(Action<T, K> e)
{
public static void Execute<T, K>(Func<bool, T, K> e)

}

失败的原因是什么呢??

Eric Lippert在他的blogFabulous Adventures In Coding 中给出了他的解释.