How do you convert epoch time in C#?

Question

How do you convert Unix epoch time into real time in C#? (Epoch beginning 1/1/1970)

Answer 1

Use the method DateTimeOffset.ToUnixTimeMilliseconds() It returns the number of milliseconds that have elapsed since 1970-01-01T00:00:00.000Z.

This is only supported with Framework 4.6 or higher

var EPOCH = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds();

It's well documented here DateTimeOffset.ToUnixTimeMilliseconds

The other way out is to use the following

long EPOCH = DateTime.UtcNow.Ticks - new DateTime(1970, 1, 1,0,0,0,0).Ticks;

To get the EPOCH with seconds only you may use

 var Epoch = (int)(DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc)).TotalSeconds;

and convert the Epoch to DateTime with the following method

private DateTime Epoch2UTCNow(int epoch) 
{
    return new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc).AddSeconds(epoch); 
}