dictionary concept

Question

how to retrive key using value from dictionary ? I know the knowledge to retrive value using key in dictionary but I don't know the knowledge to retrive key using value dictionary .kindly provide the answers thanks

Nilesh Shah · Answer

please see attached sample project I created for you to understand how it works. it is very simple: var resultKey = myDict.FirstOrDefault(d => d.Value == cityName).Key; But important thing here is avoid if it's possible becuase if dictionary object has too much data it will performance will be affected. and also the value may or may not be unique in your dictionary so always it is not possible to identify the exact record/key-value pair you want to find.

Vivek Kumar · Answer

Have a look into the below links. https://stackoverflow.com/questions/2444033/get-dictionary-key-by-value https://stackoverflow.com/questions/4001908/get-dictionary-key-by-using-the-dictionary-value https://stackoverflow.com/questions/16860643/get-key-from-value-dictionarystring-liststring