深入c# Func委托的详解

如下所示：

using system;
using system.collections.generic;
using system.linq;
using system.text;
namespace anonymous_lam
{
    delegate string convertmethod(string method);
    class lambda_fun
    {
        static void main()
        {
            convertmethod convertupperstring = uppercasestring;
            console.writeline("using delegate instance to call upperstring method");
            console.writeline(convertupperstring("guohu"));
            console.writeline("--------------------");
            console.writeline("using anonymous delegate");
            convertmethod convertasyncasestring = delegate(string s)
            {
                return s.toupper();
            };
            console.writeline(convertasyncasestring("leihu"));
            console.writeline("--------------------");
            console.writeline("using func<int t,out tresult>");
            func<string, string> funccaseupper = uppercasestring;
            console.writeline(funccaseupper("junwenli"));
            console.writeline("--------------------");
            console.writeline("using anonymous func<int t,out tresult>");
            func<string, string> funcanonycaseupper = delegate(string name)
            {
                return name.toupper();
            };
            console.writeline(funcanonycaseupper("jinhaoliu"));
            console.writeline("--------------------");
            console.writeline("using lambda expression");
            func<string, string> funclambda = name => name.toupper();
            console.writeline(funclambda("chengfan"));
        }
        static string uppercasestring(string strname)
        {
            return strname.toupper();
        }
    }
}