TimeSpan.Parse(string) converts hour values > 24 to day values

[NikoUmbleLSPA]

Description

When parsing a string like 25:00:00, TimeSpan.Parse returns an instance with 25 days instead.

Reproduction Steps

TimeSpan ts = TimeSpan.Parse("25:00:00");

### Expected behavior

Instance is set to 25 hours

### Actual behavior

Instance is set to 25 days

### Regression?

_No response_

### Known Workarounds

_No response_

### Configuration

Microsoft .NET Framework Version 4.8.09032

### Other information

Seems to be a regression of https://github.com/dotnet/runtime/issues/40316, 
which was closed as completed on [Aug 4, 2020](https://github.com/dotnet/runtime/issues/40316#event-3621743601)

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[campersau]

Looks like a duplicate of #90214

[tarekgh]

That is right, this is a duplicate of #90214. We are not willing to change this behavior because of application compatibility.

[julealgon]

@tarekgh the linked issue doesn't list any "workaround" to the original problem. Are there any? What if someone wants to represent 48 hours, is that allowed somehow by changing the format of the string?

Apologies if this was mentioned somewhere already.

[tarekgh]

TimeSpan does not support hours outside the range -23 through 23. Such an hour value is not correct for TimeSpan. We have another proposal to support Duration #72064 which will allow such scenarios.

For this specific case, if you are sure your format is always in form of "hh:mm:ss", you can manually parse it:

        public static TimeSpan Parsehhmmss(string value)
        {
            string[] parts = value.Split(':');
            if (parts.Length == 3)
            {
                if (int.TryParse(parts[0], out int hours) && int.TryParse(parts[1], out int minutes) && int.TryParse(parts[2], out int seconds))
                {
                    int days = Math.DivRem(hours, 24, out hours); // hours %= 24
                    return new TimeSpan(days, hours, minutes, seconds);
                }
            }

            throw new FormatException("Invalid TimeSpan format");
        }