C# 程式設計/關鍵字/add

add 和 remove 關鍵字允許您在將委託新增到事件或從事件中刪除委託時執行程式碼。其用法類似於屬性的 get 和 set 關鍵字。

public event MyDelegateType MyEvent
{
    add
    {
        // here you can use the keyword "value" to access the delegate that is being added
        ...
    }
    
    remove
    {
        // here you can use the keyword "value" to access the delegate that is being removed
        ...
    }
}

當將委託新增到事件時，add 塊中的程式碼將被執行。類似地，當從事件中刪除委託時，remove 塊中的程式碼將被執行。

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
特殊的 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 (用於查詢)
ascending by descending equals from group in into join let on orderby select where