<t>What I would suggest is first extending your result set with your customDimension. Then you'll have to cast your new column to either a string, an int or a double. The reason for this is that customDimensions is considered a dynamic column<br/>
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A quick example:<br/>
<br/>
traces<br/>
| extend sortKey = toint(customDimensions.MyCustomProperty)<br/>
| order by sortKey asc<br/>
<br/>
```<br/>
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The casting options are:<br/>
<br/>
- tostring()<br/>
<br/>
- toint()<br/>
<br/>
- todouble()<br/>
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If you want to remove the sorting key after the actual sort, you can `project-away` the new column.</t>
