About the use of Var and dynamic

Don't know from. NET a few start to have these 2 keywords, but can really reduce some of the programming code, performance is also unknown, only record the comparison of 2 different encodings, get the same effect:

First, the use of general code:

Let's start with the first 3 model classes:

1   Public classNmenus2     {3          PublicList<mtitle> Titles {Get;Set; }4 5          PublicNmenus ()6         {7Titles =NewList<mtitle>();8         }9     }Ten  One      Public classMtitle A     { -          Public intTid {Get;Set; } -          Public stringTname {Get;Set; } the          Public stringTicon {Get;Set; } -  -          PublicList<mtitem> Items {Get;Set; } -  +          PublicMtitle () -         { +Items =NewList<mtitem>(); A         } at     } -  -      Public classMtitem -     { -          Public intIID {Get;Set; } -          Public stringIname {Get;Set; } in          Public stringIicon {Get;Set; } -          Public stringIurl {Get;Set; } to}

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Then look at the code that filters and goes to JSON:

1Nmenus menus =NewNmenus ();2                 foreach(Sysnavmenu titleinchtitles)3                 {4                     varItems = fromMinchmenuslist5                                 whereM.pmid = =title. MId6                                 Select NewMtitem {iid = m.mid, Iname = m.mtext, Iicon = M.icon, Iurl =M.murl};7                     vart =Newmtitle {tid = title. MId, Tname = title. MText, Ticon = title. Icon, items = items. Tolist<mtitem>() };8 menus.titles.Add (t);9                 }TenJsonmenus = jsonconvert.serializeobject (menus);

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Second, use the code of VAR and dynamic:

1                 varMenus =New{titles =NewList<dynamic>() };2                 foreach(Sysnavmenu titleinchtitles)3                 {4                     varItems = fromMinchmenuslist5                                 whereM.pmid = =title. MId6                                 Select New{iid = M.mid, Iname = m.mtext, Iicon = M.icon, Iurl =M.murl};7                     vart =New{tid = title. MId, Tname = title. MText, Ticon = title. Icon, items = items. Tolist<dynamic>() };8 menus.titles.Add (t);9                 }TenJsonmenus = jsonconvert.serializeobject (menus);

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Summary: One and two get the final Jsonmenus string is the same, the only difference is only ...

About the use of Var and dynamic