StringFormat doesn't return the correct currency format

• .NET Core Version: 5
• Windows version: Windows 10 Pro
• Does the bug reproduce also in WPF for .NET Framework 4.8?: No
• Is this bug related specifically to tooling in Visual Studio (e.g. XAML Designer, Code editing, etc…)? No

Problem description: Binding to a decimal value using the currency StringFormat (“c”) produces the wrong output for (en-US) culture with CurrencyNegativePattern=0.

Actual behavior: “-$123.45”

Expected behavior: “($123.45)”

Minimal repro: View Model

public class TestViewModel
{
    public decimal DecimalValue { get; set; } = -123.45M;
    public string FormattedValue
    {
        get
        {
            return DecimalValue.ToString("c");
        }
    }
}

XAML Binding

<Window.DataContext>
    <local:TestViewModel x:Name="vm"/>
</Window.DataContext>
<StackPanel>
    <StackPanel Margin="20">
        <TextBox Text="{Binding DecimalValue, StringFormat=c}"/>
        <TextBox Text="{Binding FormattedValue, Mode=OneWay}"/>
    </StackPanel>

    <StackPanel Margin="20">
        <TextBlock Text="{Binding DecimalValue, StringFormat=c}"/>
        <TextBlock Text="{Binding FormattedValue, Mode=OneWay}"/>
    </StackPanel>
</StackPanel>

Example Output

[dipeshmsft]

@DannyLee89 @miloush, as per my understanding we have reached to a conclusion on this issue, right ?? Is it alright to close this ?

[dipeshmsft]

Closing this issue