Add a pair of and to , only if doesn't already contain the .
Parameters
- dico
- This dictionary.
- key
- The key.
- value
- The value.
Type Parameters
- TKey
- TValue
Return Value
false if the already contains the . Else add the pair and and returns true.
Target Platforms: Windows 11, 10, 8, 7 and Linux, MacOS with net8.0, net7.0 or net6.0 installed