Implementing IValueConverter for a DateTime throws Error

[mileski]

Describe the bug

I want to create a IValueConverter which converts a given DateTime in UTC to a local time.

public object Convert(object value, Type targetType, object parameter, string language)
 {
     if (value is not DateTime dt)
     {
         throw new InvalidOperationException("The target must be a DateTime");
     }
     return dt.ToLocalTime();
 }

If you use this converter it will throw an Error that cannot cast a System.DateTime object to a System.String object.

You need to return a value that is of type string in order to work. Like this: return dt.ToLocalTime().ToString(CultureInfo.CurrentCulture)

As per my logic, when I pass an object of a specific type in the converter, it should also be possible to return the same object type.

Steps to reproduce the bug

Create a IValueConverter which converts a given DateTime in UTC to a local time.

public object Convert(object value, Type targetType, object parameter, string language)
 {
     if (value is not DateTime dt)
     {
         throw new InvalidOperationException("The target must be a DateTime");
     }
     return dt.ToLocalTime();
 }

Expected behavior

No response

Screenshots

No response

NuGet package version

None

Windows version

No response

Additional context

No response