Get Epoch Time in C# on .NET similar to time().now in Ruby/PHP

GetEpochTime.cs

string GetEpochTime()
{
 var utcDate = DateTime.Now.ToUniversalTime();                   
 long baseTicks = 621355968000000000;
 long tickResolution = 10000000;
 long epoch = (utcDate.Ticks - baseTicks) / tickResolution;
 long epochTicks = (epoch * tickResolution) + baseTicks;
 var date = new DateTime(epochTicks, DateTimeKind.Utc);
 return epoch.ToString();
}