how to Retrieve data object to string values in c#?

Question

I have a data response. I want to retrieve Status and Days as two separate parameters. Please advise me on how to do that.

var response = {"return":{"transactionStatus":{"Status":"Ok","Days":17,"execution":12.5},"Id":"xxxxxxx","surname":"xxx"}}

string status =    //help me to retriew this
string Days =  //help me to retriew this