Update C# examples for ja-JP and en-US DateTimeFormatInfo

[matouskozak]

Summary

In dotnet/runtime#105097, we discovered that the example provided for .NET DateTimePattern are out-of-date. In this PR, we update the examples of FullDateTimePattern, LongDatePattern, MonthDayPattern for en-US and ja-JP cultures.

---

cc: @tarekgh @vitek-karas

[learn-build-service-prod]

Learn Build status updates of commit d7166c1:

✅ Validation status: passed

File	Status	Preview URL	Details
snippets/csharp/System.Globalization/DateTimeFormatInfo/FullDateTimePattern/dtfi_fulldatetimepattern.cs	✅Succeeded	View
snippets/csharp/System.Globalization/DateTimeFormatInfo/LongDatePattern/dtfi_longdatepattern.cs	✅Succeeded	View
snippets/csharp/System.Globalization/DateTimeFormatInfo/MonthDayPattern/dtfi_monthdaypattern.cs	✅Succeeded	View

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel

[matouskozak]

I see Error: ERROR: Project missing. A project (and optionally a solution file) must be in this directory or one of the parent directories to validate and build this code. failure in the Snippets 5000 job. Am I missing something?

[tarekgh]

@gewarren do you know why the CI is failing while updating only existing sample source?

[gewarren]

@gewarren do you know why the CI is failing while updating only existing sample source?

Yes, we are trying to get project files added for every snippet, so if a project file doesn't exist for any snippet that's touched, it errors.

[tarekgh]

we are trying to get project files added for every snippet, so if a project file doesn't exist for any snippet that's touched, it errors.

Should we ignore the error? or we must add the project file with the change?

[gewarren]

we are trying to get project files added for every snippet, so if a project file doesn't exist for any snippet that's touched, it errors.

Should we ignore the error? or we must add the project file with the change?

If Matous can add one, that would be great. Something like this, but might as well target .NET 8: https://github.com/dotnet/dotnet-api-docs/blob/main/snippets/csharp/System.Globalization/DateTimeFormatInfo/FullDateTimePattern/Project.csproj

[learn-build-service-prod]

Learn Build status updates of commit 2ff3d3d:

✅ Validation status: passed

File	Status	Preview URL	Details
snippets/csharp/System.Globalization/DateTimeFormatInfo/FullDateTimePattern/dtfi_fulldatetimepattern.cs	✅Succeeded	View
snippets/csharp/System.Globalization/DateTimeFormatInfo/FullDateTimePattern/Project.csproj	✅Succeeded
snippets/csharp/System.Globalization/DateTimeFormatInfo/LongDatePattern/dtfi_longdatepattern.cs	✅Succeeded	View
snippets/csharp/System.Globalization/DateTimeFormatInfo/LongDatePattern/Project.csproj	✅Succeeded
snippets/csharp/System.Globalization/DateTimeFormatInfo/MonthDayPattern/dtfi_monthdaypattern.cs	✅Succeeded	View
snippets/csharp/System.Globalization/DateTimeFormatInfo/MonthDayPattern/Project.csproj	✅Succeeded

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel

[matouskozak]

we are trying to get project files added for every snippet, so if a project file doesn't exist for any snippet that's touched, it errors.

Should we ignore the error? or we must add the project file with the change?

If Matous can add one, that would be great. Something like this, but might as well target .NET 8: https://github.com/dotnet/dotnet-api-docs/blob/main/snippets/csharp/System.Globalization/DateTimeFormatInfo/FullDateTimePattern/Project.csproj

I added the Project.csproj, however now it complains that D:\a\dotnet-api-docs\dotnet-api-docs\snippets\csharp\System.Globalization\DateTimeFormatInfo\LongDatePattern\longdatepattern2.cs(8,23): error CS0111: Type 'Example' already defines a member called 'Main' with the same parameter types [D:\a\dotnet-api-docs\dotnet-api-docs\snippets\csharp\System.Globalization\DateTimeFormatInfo\LongDatePattern\Project.csproj] and D:\a\dotnet-api-docs\dotnet-api-docs\snippets\csharp\System.Globalization\DateTimeFormatInfo\LongDatePattern\longdatepattern2.cs(6,14): error CS0101: The namespace '<global namespace>' already contains a definition for 'Example' [D:\a\dotnet-api-docs\dotnet-api-docs\snippets\csharp\System.Globalization\DateTimeFormatInfo\LongDatePattern\Project.csproj].

Should I rename the public class Example in longdatepattern1/2.cs to public class Example1/2 or what is the proper fix here?

[gewarren]

Should I rename the public class Example in longdatepattern1/2.cs to public class Example1/2 ...?

Yes, please. Sorry for the hassle.

[matouskozak]

Should I rename the public class Example in longdatepattern1/2.cs to public class Example1/2 ...?

Yes, please. Sorry for the hassle.

No problem, thank you for the help. Looks to be green now.

[learn-build-service-prod]

Learn Build status updates of commit 8cfbd66:

✅ Validation status: passed

File	Status	Preview URL	Details
snippets/csharp/System.Globalization/DateTimeFormatInfo/FullDateTimePattern/dtfi_fulldatetimepattern.cs	✅Succeeded	View
snippets/csharp/System.Globalization/DateTimeFormatInfo/FullDateTimePattern/Project.csproj	✅Succeeded
snippets/csharp/System.Globalization/DateTimeFormatInfo/LongDatePattern/dtfi_longdatepattern.cs	✅Succeeded	View
snippets/csharp/System.Globalization/DateTimeFormatInfo/LongDatePattern/longdatepattern1.cs	✅Succeeded	View
snippets/csharp/System.Globalization/DateTimeFormatInfo/LongDatePattern/longdatepattern2.cs	✅Succeeded	View
snippets/csharp/System.Globalization/DateTimeFormatInfo/LongDatePattern/Project.csproj	✅Succeeded
snippets/csharp/System.Globalization/DateTimeFormatInfo/MonthDayPattern/dtfi_monthdaypattern.cs	✅Succeeded	View
snippets/csharp/System.Globalization/DateTimeFormatInfo/MonthDayPattern/Project.csproj	✅Succeeded

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel