How to get some values from a JSON string in C#?

Question

string source

{"Amount":16700000,"CardNumber":"0095","MerchantReference":"7654325","PaymentReference":"FBN|WEB|WEBP|3-02-2016|170619","RetrievalReferenceNumber":"000000088836"
,"LeadBankCbnCode":null,"LeadBankName":null,"SplitAccounts":[],"TransactionDate":"2016-02-03T16:41:43.923","ResponseCode":"00","ResponseDescription":"Approved Successful"}

how do i get the values of Transaction Date,ResponseDescription and Transaction date with c sharp ,please i need the code,Thank you