How to get transaction item from queue

I added datatable to queue and by convering to jsonstring and trying to get transaction item from queue but there is an issue with deserialization its throwing an error

Deserialize JSON: The given key was not present in the dictionary.

You are trying to get the value from the key which is not available in dictionary.
For example : dictConfig.item(“Name”) , you are using this , but “Name” is not available in your dictionary .
Check spelling mistake or make sure you are accessing the key which is available in your dictionary.