c# - Remove from Dictionary by Key and Retrieve Value

Question

Is there a way to remove an entry from a Dictionary (by Key) AND retrieve its Value in the same step?

For example, I'm calling

Dictionary.Remove(Key);

but I also want it to return the Value at the same time. The function only returns a bool.

I know I can do something like

Value = Dictionary[Key];
Dictionary.Remove(Key);

but it seems like this will search the dictionary twice (once to get the value, and another time to remove it from the dictionary). How can I (if possible) do both WITHOUT searching the dictionary twice?

Answer 1

Starting with .NET Core 2.0, we have:

public bool Remove (TKey key, out TValue value);

https://docs.microsoft.com/en-us/dotnet/api/system.collections.generic.dictionary-2.remove?view=netcore-2.0#System_Collections_Generic_Dictionary_2_Remove__0__1__

Note this API hasn't been included in .NET Standard 2.0 and .NET Framework 4.7.