C# 程式設計/關鍵字/default

default 關鍵字可以在switch 語句或泛型程式碼中使用：

• switch 語句：指定預設標籤。
• 泛型程式碼：指定型別引數的預設值。對於引用型別，這將是 null，對於值型別，這將是零。

參考文獻

C# 關鍵字
abstract as base bool break byte case catch char checked class const continue decimal default delegate do double else enum event explicit extern false finally fixed float for foreach goto if implicit in int interface internal is lock long namespace new null object operator out override params private protected public readonly ref return sbyte sealed short sizeof stackalloc static string struct switch this throw true try typeof uint ulong unchecked unsafe ushort using var virtual void volatile while
特殊 C# 識別符號（上下文關鍵字）
add alias async await dynamic get global nameof partial remove set value when where yield
上下文關鍵字（在查詢中使用）
ascending by descending equals from group in into join let on orderby select where