ET9_WebGL_Dev/CSharp/Platform/Helper/TimeHelper.cs

using System;

namespace Helper
{
	public static class TimeHelper
	{
		public static long EpochTimeSecond()
		{
			var epoch = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
			return Convert.ToInt64((DateTime.UtcNow - epoch).TotalSeconds);
		}
	}
}