> For clean Markdown content of this page, append .md to this URL. For the complete documentation index, see https://buildwithfern.com/learn/llms.txt. ## 0.0.23 **`(feat):`** The SDK is now compatible exclusively with .NET 6. This change reflects significant code adjustments needed for .NET 4+ compatibility. ## 0.0.22 **`(feat):`** The SDK now includes support for .NET 4.