I'm looking for something along these lines:

<TextBlock
    Grid.Column="1"
    Text="Welcome, {Binding UserName}!" />

This will of course actually display the text "{Binding UserName}" to the user rather than decode it, but I know you can do something like this with ASP.NET, so I'm hoping there's a way to get this to work in WPF.

I'm already aware that I could use an IValueConverter...I'm looking for something I can do purely in markup if possible.

EDIT:

Based on @Matt Hamilton's most excellent solution, I attempted to push the envelope and bind two values into the same TextBlock using a MultiBinding. Works like a charm:

<TextBlock
    Style="{StaticResource TextBlock_ValueStyle}"
    Grid.Column="1">
    <TextBlock.Text>
        <MultiBinding
            StringFormat="{}Attempts: {0:G} of {1:G}">
            <Binding
                Path="AttemptNumber" />
            <Binding
                Path="AttemptCount" />
        </MultiBinding>
    </TextBlock.Text>
</TextBlock>

This produces: Attempts: 1 of 4 (assuming AttemptNumber = 1 and AttemptCount = 4).

I also found this link helpful for figuring out which formats to place after the colon:

http://msdn.microsoft.com/en-us/library/fbxft59x.aspx

wpf data-binding xaml
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