SlowCheetah

XML Transforms for app.config and other XML files

Visual Studio Extension

for creating and previewing transforms: https://marketplace.visualstudio.com/items?itemName=WillBuikMSFT.SlowCheetah-XMLTransforms

Upgrading From Previous Versions (v2.5.15 and lower)

https://github.com/Microsoft/slow-cheetah/blob/master/doc/update.md