RadioButton ContentStringFormat not working

Question

I have been struggling to get this code below to work. The binding works but the ContentStringFormat in the first or StringFormat in the second one doesn't seem to work.

<RadioButton Content="{Binding ClientCode}" ContentStringFormat="{}{0} copy"
             IsChecked="{Binding Path= FilterType,
                 Converter={StaticResource EBConverter}, 
                 ConverterParameter={x:Static wordMerge:FilterType.ClientCopy}}" 
             Width="90"/>

The above code just returns the binding value say "ABC" but I am expecting "ABC copy"

 <RadioButton IsChecked="{Binding Path= FilterType,
                 Converter={StaticResource EBConverter},
                 ConverterParameter={x:Static wordMerge:FilterType.ClientCopy}}" 
              Width="90">
    <RadioButton.Content>
        <TextBlock Text="{Binding ClientCode, StringFormat={}{0} copy}"/>
     </RadioButton.Content>
 </RadioButton>

The above code not returning any values for binding.

Updated The string copy is not displayed during design time or at runtime in both cases.

Answer 1

Try this

StringFormat='{}copy {0}'}"

tested

<TextBlock Text="{Binding Path=Str, Mode=OneWay, StringFormat='{}{0} copy'}"/>   

@Kiru it works for me

<RadioButton Content="{Binding Path=Str, Mode=OneWay}"  ContentStringFormat='{}{0} copy'/>
<RadioButton>
    <TextBlock Text="{Binding Path=Str, Mode=OneWay, StringFormat='{}{0} copy'}"/>
</RadioButton>