Nullability of type of parameter 'value' doesn't match overridden member (possibly because of nullability attributes).

Dereference of a possibly null reference.

'OpenFolderDialog' is obsolete: 'Use Window.StorageProvider API or TopLevel.StorageProvider API'

Cannot convert null literal to non-nullable reference type.

Possible null reference argument for parameter 'result' in 'void TaskCompletionSource<string>.SetResult(string result)'.

Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

Non-nullable field '_imageProperties' must contain a non-null value when exiting constructor. Consider declaring the field as nullable.

Non-nullable field '_selectedFormat' must contain a non-null value when exiting constructor. Consider declaring the field as nullable.