What's the shorter xaml syntax for Multibinding using StringFormat with multiple bindings?

Question

for a single binding, we use:

<TextBlock>
  <TextBlock.Text>
    <MultiBinding StringFormat="{}{0}">
      <Binding Path=EmployeeName/>
    </MultiBinding>
  </TextBlock.Text>
</TextBlock>

or a shorter syntax:

<TextBlock 
 Text="{MultiBinding StringFormat=\{0\}, Bindings={Binding Path=EmployeeName}}"/>

Now, if you have multibinding:

<TextBlock>
  <TextBlock.Text>
    <MultiBinding StringFormat="{}{0}, {2}">
      <Binding Path="EmployeeName"/>
      <Binding Path="Age"/>
    </MultiBinding>
  </TextBlock.Text>
</TextBlock>

I was wondering, what would be its shorter syntax?

<TextBlock 
 Text="{MultiBinding StringFormat=\{0\}, Bindings={Binding ??????}"/>

Answer 1

According to MSDN, your second example ("shorter syntax using MultiBinding with a single Binding") shouldn't work, neither in .net 3.5 nor in .net 4.0:

Note:

MultiBinding and PriorityBinding do not support a XAML extension syntax (despite sharing the same BindingBase class, which actually implements the XAML behavior for Binding).

So, if it works for you, that's by accident, and it's not supported behavior.

---

PS: You don't need to use MultiBinding for a single binding. The following should suffice:

<TextBlock>
    <TextBlock.Text>
        <Binding Path="EmployeeName" />
    </TextBlock.Text>
</TextBlock>

or

<TextBlock Text="{Binding Path=EmployeeName}"/>

or even shorter

<TextBlock Text="{Binding EmployeeName}"/>