.NET for Android error XA1036

Example messages

error XA1036: AndroidManifest.xml //uses-sdk/@android:minSdkVersion '29' does not match the $(SupportedOSPlatformVersion) value '21' in the project file (if there is no $(SupportedOSPlatformVersion) value in the project file, then a default value has been assumed).
Either change the value in the AndroidManifest.xml to match the $(SupportedOSPlatformVersion) value, or remove the value in the AndroidManifest.xml (and add a $(SupportedOSPlatformVersion) value to the project file if it doesn't already exist).

Issue

This error indicates that you have a mismatch between the minSdkVersion element set in your AndroidManifest.xml and the $(SupportedOSPlatformVersion) property value in your project file.

Solution

Raise the value of //uses-sdk/@android:minSdkVersion in AndroidManifest.xml to match the $(SupportedOSPlatformVersion), or remove //uses-sdk/@android:minSdkVersion from AndroidManifest.xml and set $(SupportedOSPlatformVersion) in your project file if it is unset.