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TimeZoneInfo.ConvertTimeFromUtc is returning the wrong value

I'm taking a set date/time value and converting from UTC, but timezone. I'm expecting to get the original time - 5 to be the correct time in the EST time zone, but it is off by 1 hour and only offset it by 4 hours.
string dateString = "3/15/2021 6:59 AM";
DateTime TimeDataDue = DateTime.Parse(dateString, System.Globalization.CultureInfo.InvariantCulture);
TimeZoneInfo easternZone = TimeZoneInfo.FindSystemTimeZoneById("Eastern Standard Time");
var TimeDataDueEastern = TimeZoneInfo.ConvertTimeFromUtc(TimeDataDue, easternZone).Dump();
The output I get is "3/15/2021 2:59:00 AM", but I expect to get "3/15/2021 1:59:00 AM"
Any suggestions?
Thanks!

As Yarik said in the question comments, the result you obtained is correct.
You can review the 2021 DST schedule for the US Eastern Time zone here:
https://www.timeanddate.com/time/zone/usa/new-york?year=2021
Additionally, you'll note that easternZone.DisplayName in your code will be "(UTC-05:00) Eastern Time (US & Canada)" (assuming English). In other words, despite the time zone having the word "Standard" in its Id, it applies for the entire year including both EST and EDT periods.
Since EDT is in effect on March 15th 2021, you get a result that is four hours behind UTC.

TimeZoneInfo.ConvertTimeFromUTC produce different output then TimeZone.BaseUTCOffset

I have a UTC date-time, I need to convert it to EST time zone. It should be as simple as this
var easternZone = TimeZoneInfo.FindSystemTimeZoneById("Eastern Standard Time");
var dt = DateTime.SpecifyKind(value, DateTimeKind.Utc);
return TimeZoneInfo.ConvertTimeFromUtc(dt, easternZone);
So my input date is
02-08-2019 22:53:32
and the result value is
02-08-2019 18:53:32
It deduct 4 hours from given time.
But if I check the Offset between Eastern Standard Time Zone and UTC time zone then the value it return is
easternZone.BaseUtcOffset {-05:00:00} System.TimeSpan
If this is true then above result value should be
02-08-2019 17:53:32
I am not sure what I am missing here.

I am not sure what I am missing here.
BaseUtcOffset does not take into account daylight saving time (it can't, since it doesn't know what specific date you are interested in). You likely want to use GetUtcOffset:
The returned time span includes any differences due to the application
of adjustment rules to the current time zone. It differs from the
BaseUtcOffset property, which returns the difference between
Coordinated Universal Time (UTC) and the time zone's standard time
and, therefore, does not take adjustment rules into account.
Adjustment Rule is discussed here (emphasis mine):
Provides information about a time zone adjustment, such as the
transition to and from daylight saving time.
As a general rule, if dates are ever <= 1 hour out from what you expect, look into daylight savings issues.
To illustrate the impact of daylight saving time:
var timeUtc = Convert.ToDateTime("01-01-2019 22:53:32");
var easternZone = TimeZoneInfo.FindSystemTimeZoneById("Eastern Standard Time");
var dt = DateTime.SpecifyKind(timeUtc, DateTimeKind.Utc);
Console.WriteLine(TimeZoneInfo.ConvertTimeFromUtc(dt, easternZone));
Console.WriteLine(easternZone.GetUtcOffset(dt));
timeUtc = Convert.ToDateTime("07-07-2019 22:53:32");
easternZone = TimeZoneInfo.FindSystemTimeZoneById("Eastern Standard Time");
dt = DateTime.SpecifyKind(timeUtc, DateTimeKind.Utc);
Console.WriteLine(TimeZoneInfo.ConvertTimeFromUtc(dt, easternZone));
Console.WriteLine(easternZone.GetUtcOffset(dt));
The above code will output:
1/1/2019 5:53:32 PM
-05:00:00
7/7/2019 6:53:32 PM
-04:00:00

Try This :
var timeUtc = Convert.ToDateTime("02-08-2019 22:53:32");
TimeZoneInfo easternZone = TimeZoneInfo.FindSystemTimeZoneById("Eastern Standard Time");
DateTime easternTime = TimeZoneInfo.ConvertTimeFromUtc(timeUtc, easternZone);
Console.WriteLine(easternTime);

C# TimeZoneInfo.ConvertTime incorrect result

I'm trying to convert time between two timezones, and found out an hour difference between US Eastern Standard Time to Western European Time
Supposedly, USA Eastern Standard Time (EST) 2018 Jun-18 1PM should be Western European Time (WET) same day 6PM, but the result from c# ConvertTime is 7PM, I think I missed something for the daylight setting?
Anyway, here's the code:
var str = "2018-07-09T13:00:00";
var dt = Convert.ToDateTime(str);
var SourceZoneValue = "Eastern Standard Time";
var DestinationZoneValue = "W. Europe Standard Time";
TimeZoneInfo sourceTimeZone = TimeZoneInfo.FindSystemTimeZoneById(SourceZoneValue);
TimeZoneInfo destinationTimeZone = TimeZoneInfo.FindSystemTimeZoneById(DestinationZoneValue);
DateTime localTime = TimeZoneInfo.ConvertTime(dt, sourceTimeZone, destinationTimeZone);
Console.WriteLine(localTime);
The outcome is 7PM instead 6PM, any idea? tks

You want to convert from Eastern Standard Time to W. Europe Standard Time, say from New York to Amsterdam.
New York time zone is -5 GMT, and Amsterdam time zone is +1 GMT:
New York Daylight saving started 11 March 2018 and will end on 4 November 2018.
Amsterdam Daylight saving started 25 March 2018 and will end on 28 October 2018.
Your date is 18 June, so daylight saving does not affect the time difference, I would say 7 PM is the correct result.
Maybe W. Europe Standard Time is not the correct time zone that you are looking for? For example, for the UK time:
var britishZone = TimeZoneInfo.FindSystemTimeZoneById("GMT Standard Time");

TimeZone.GetUtcOffset() Requires DateTime, but DateTime's Timezone is Ignored, why?

My goal is to get the difference between UTC and another time zone. Take for example the difference between UTC and EST (UTC-5:00). Also for sake of example assume my system is currently in Pacific Standard Time so DateTime.Kind, "LOCAL", is PST. In order to find the difference between UTC and EST I'm forced to provide a DateTime which I'm providing in PST. Here's a simplified snippet of my code:
public static void Run_Timezone_Test()
{
var myDate = DateTime.Now;
Console.WriteLine(myDate.Kind);
//OUTPUT: Local (note this is currently PST)
var easternTimeZone = TimeZoneInfo.FindSystemTimeZoneById("Eastern Standard Time");
var offset = easternTimeZone.GetUtcOffset(myDate);
Console.WriteLine(offset);
//OUTPUT: -05:00:00 (correct offset for EST)
Console.ReadLine();
}
Why am I forced to provide "myDate" if it and its time zone are not used?

Here's an example of why it matters:
var AUSEast = TimeZoneInfo.FindSystemTimeZoneById("AUS Eastern Standard Time");
var offset = AUSEast.GetUtcOffset(DateTime.Now);
Console.WriteLine(offset);
offset = AUSEast.GetUtcOffset(DateTime.Now.AddMonths(6));
Console.WriteLine(offset);
At the time of writing, this will output (assuming you have AEST installed as a system time - you can check via TimeZoneInfo.GetSystemTimeZones()):
11:00:00
10:00:00
Note that a time zone does not indicate an offset from UTC by itself. Time anomalies (most commonly daylight savings) will change the UTC offset while still remaining in the same time zone

How to solve timezone conversion error?

I am trying to convert to a swedish timezone with this code:
Thread.CurrentThread.CurrentCulture = new CultureInfo("sv-SE");
TimeZoneInfo cet = TimeZoneInfo.FindSystemTimeZoneById("Central European Standard Time");
DateTime currentDate = DateTime.SpecifyKind(DateTime.Now, DateTimeKind.Local);
var swedishTime = TimeZoneInfo.ConvertTime(currentDate, cet, TimeZoneInfo.Local);
For some reason I am getting:
{"The conversion could not be completed because the supplied DateTime
did not have the Kind property set correctly. For example, when the
Kind property is DateTimeKind.Local, the source time zone must be
TimeZoneInfo.Local.\r\nParameter name: sourceTimeZone"}
What am i missing?

A few things:
Culture only affects output formatting when converting to/from strings. It doesn't affect time zone conversions, so it is unnecessary here.
The time zone identifiers used by TimeZoneInfo on Windows come from the Windows operating system itself, and sometimes their names do not match up to what you may expect.
You're using the Windows time zone ID "Central European Standard Time", which has a display name of "(UTC+01:00) Sarajevo, Skopje, Warsaw, Zagreb".
For Sweden, you should actually use the ID "W. Europe Standard Time", which has a display name of "(UTC+01:00) Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna"
You can read more about this in the section titled "The Microsoft Windows Time Zone Database" in the timezone tag wiki.
Since it appears you are looking for the current time in a particular time zone, you should not be going through the local time zone at all. Just convert directly from UTC to the target time zone.
The code should simply be:
var tz = TimeZoneInfo.FindSystemTimeZoneById("W. Europe Standard Time");
var swedishTime = TimeZoneInfo.ConvertTime(DateTime.UtcNow, tz);
Or if you prefer, you can use a convenience method:
var swedishTime = TimeZoneInfo.ConvertTimeBySystemTimeZoneId(DateTime.UtcNow,
"W. Europe Standard Time")

Just delete "TimeZoneInfo.Local" from "var swedishTime".
Thread.CurrentThread.CurrentCulture = new CultureInfo("sv-SE");
TimeZoneInfo cet = TimeZoneInfo.FindSystemTimeZoneById("Central European Standard Time");
DateTime currentDate = DateTime.SpecifyKind(DateTime.Now, DateTimeKind.Local);
var swedishTime = TimeZoneInfo.ConvertTime(currentDate, cet);

I faced the same issue and I fixed it by changing to DateTimeKind.Unspecified.
Instead of this
var currentDateTime = DateTime.UtcNow;
I put this:
var currentDateTime = new DateTime(DateTime.UtcNow.Ticks, DateTimeKind.Unspecified);