DateTime? proprety value cannot be set correctly

[tarekgh]

@tongqijie commented on Fri Mar 03 2017

i have a class contains a property whose type is DateTime?

public class SubItem
{
    public string StringValue { get; set; }

    public int? IntegerValue { get; set; }

    public DateTime? DateValue { get; set; }

    public bool? BooleanValue { get; set; }
}

i set value to property 'DateValue' like this:

var subItem = new SubItem();
subItem.DateValue = DateTime.Now;

the problem is that subItem.DateValue is always {01/01/0001 00:07:28}. why?

please help me...

---

@tongqijie commented on Fri Mar 03 2017

here is my dotnet --info:

.NET Command Line Tools (1.0.0-preview2-003131)

Product Information:
 Version:            1.0.0-preview2-003131
 Commit SHA-1 hash:  635cf40e58

Runtime Environment:
 OS Name:     Mac OS X
 OS Version:  10.12
 OS Platform: Darwin
 RID:         osx.10.12-x64

---

@tongqijie commented on Fri Mar 03 2017

it works fine on windows.

.NET Command Line Tools (1.0.0-preview2-003131)

Product Information:
 Version:            1.0.0-preview2-003131
 Commit SHA-1 hash:  635cf40e58

Runtime Environment:
 OS Name:     Windows
 OS Version:  10.0.14393
 OS Platform: Windows
 RID:         win10-x64

---

@svick commented on Sat Mar 04 2017

The following code works fine for me on Linux:

using System;

public class SubItem
{
    public string StringValue { get; set; }

    public int? IntegerValue { get; set; }

    public DateTime? DateValue { get; set; }

    public bool? BooleanValue { get; set; }
}

public class Program
{
    public static void Main()
    {
        var subItem = new SubItem();
        subItem.DateValue = DateTime.Now;
        Console.WriteLine(subItem.DateValue);
    }
}

Could you share a complete program that demonstrates the issue? How exactly are you viewing the value? Are you using some debugger or IDE? Are you sure your machine has the correct time set?

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@tongqijie commented on Sat Mar 04 2017

public class Program
{
    public static void Main(string[] args)
    {
        var subItem = new SubItem();
        subItem.DateValue = DateTime.Now;

        Console.WriteLine(subItem.DateValue?.ToString());
    }

    public class SubItem
    {
        public string StringValue { get; set; }

        public int? IntegerValue { get; set; }

        public DateTime? DateValue { get; set; }

        public bool? BooleanValue { get; set; }
    }
}

today, i found it worked fines, but it was weird to watch variable's value when debugging.

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@svick commented on Sat Mar 04 2017

I can see the same behavior in VS Code on Linux.

I believe this is dotnet/vscode-csharp#753, which is in turn caused by https://github.com/dotnet/coreclr/issues/7115, which should be fixed in the next version of .Net Core. But it is only a debugging bug, so it shouldn't affect how your application actually executes.

[gkhanna79]

@lt72 @mikem8361 PTAL and close (with details) if already fixed.

[mikem8361]

PR dotnet/coreclr#7149 in coreclr fixed this and it should have made it into .NET Core 1.1.