DateTime format 'E' and 'e' shortcuts for a popular European datetime format style dd/MM/yyyy

[avertiy]

I wondered why C# does not yet provide a special shortcut for a popular European date style format

G or g format modifiers format date time in US-style (I know it depends on culture settings but in most cases we use G shortcut):
dateTime.ToString("G") is equivalent of dateTime.ToString("MM/dd/yyyy HH:mm:ss")
dateTime.ToString("g") is equivalent of dateTime.ToString("MM/dd/yyyy HH:mm")

why not to add an 'E' shortcut for European date style e.g.

dateTime.ToString("E") to be equivalent of dateTime.ToString("dd/MM/yyyy HH:mm:ss")
dateTime.ToString("e") to be equivalent of dateTime.ToString("dd/MM/yyyy HH:mm")

[colejohnson66]

Format codes are not C#, but the runtime: @dotnet/runtime

[huoyaoyuan]

G or g format modifiers format date time in US-style

It formats in the "general" style of current culture. https://learn.microsoft.com/en-us/dotnet/standard/base-types/standard-date-and-time-format-strings#table-of-format-specifiers

When a European culture is supplied or set as the default culture, it will format as European style.

provide a special shortcut

The culture-aware formatting strings shouldn't be treated as a "shortcut". It's just follows current culture.
A common mistake is to use culture-aware formatting for persisted storage. They should only be used for displaying.