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Why are C# 4 optional parameters defined on interface not enforced on implementing class?

I noticed that with the optional parameters in C# 4 if you specify an optional parameter on an interface you don,t have to make that parameter optional on any implementing class: ...
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slashes in url variables

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How do I make many-to-many field optional in Django?

... answered Mar 27 '10 at 15:46 Ludwik TrammerLudwik Trammer 20.8k55 gold badges5555 silver badges8686 bronze badges ...
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How to detect current state within directive

... answered Feb 14 '14 at 22:22 darthwadedarthwade 1,42411 gold badge1010 silver badges55 bronze badges ...
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Get “Value” property in IGrouping

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Difference between '..' (double-dot) and '…' (triple-dot) in range generation?

...e?(5) #=> true (1...5).include?(5) #=> false (1..4).include?(4.1) #=> false (1...5).include?(4.1) #=> true (1..4).to_a == (1...5).to_a #=> true (1..4) == (1...5) #=> false †The docs used to not include this, instead requiring read...
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Setting Vim whitespace preferences by filetype

... 245 there are many ways, but here's a simple, easy to understand way. add these lines to your ~/.vi...
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JS: Check if date is less than 1 hour ago?

...sAfter(dayjs().subtract(1, 'hours')); }; – turrican_34 Nov 26 '19 at 15:54 This was pretty close to what I needed. whi...
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Take diff of two vertical opened windows in Vim

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@Html.BeginForm Displaying “System.Web.Mvc.Html.MvcForm” on Page

... 147 The recommended way to generate a form is the following: <div id="deletestatusupdate"> ...