I has in string format, timestamp 1593339378252, i need convert this, to a normal human date-20.06.2020
I try this code
var timestamp = Convert.ToInt64(dateFrom);
            // Format our new DateTime object to start at the UNIX Epoch
            System.DateTime dateTime = new System.DateTime(1970, 1, 1, 0, 0, 0, 0);
            // Add the timestamp (number of seconds since the Epoch) to be converted
            dateTime = dateTime.AddSeconds(timestamp);
but if i try convert to int32,16,64 i get System.ArgumentOutOfRangeException
 
     
    