<p>I currently have two text boxes which accept any number. I have a text block that takes the two numbers entered and calculates the average. </p>

<p>I was wondering if there was a way I could bind this text block to both text boxes and utilize a custom converter to calculate the average? I currently am catching the text changed events on both text boxes and calculating the average that way, but I am under the assumption data binding would be more efficient and easier.</p>

You're looking for
```
MultiBinding
```
.
Your
```
XAML
```
will look something like this:
```
```
<TextBlock>
  <TextBlock.Text>
    <MultiBinding Converter="{StaticResource myConverter}">
      <Binding Path="myFirst.Value" />
      <Binding Path="mySecond.Value" />
    </MultiBinding>
  </TextBlock.Text>
</TextBlock>
```
```
With reasonable replacements for
```
myConverter
```
,
```
myFirst.Value
```
, and
```
mySecond.Value
```
.