Using an array in Azure web app settings

Adding the settings under "App settings" like this will do the trick... Notice the ":0" and ":1" below

Format: Key -> Value

SomeSettings:PropA -> AzureValueA
SomeSettings:PropB:0 -> AzureValueB1
SomeSettings:PropB:1 -> AzureValueB2

If you aren't running on Windows, replace the colon : with double underscore __ to get your app to see the settings. So instead of e.g. SomeSettings:PropA, you'd use SomeSettings__PropA.