The type or namespace name 'Database' could not be found (are you missing a using directive or an assembly reference?)

The type or namespace name 'Database' could not be found (are you missing a using directive or an assembly reference?)

Process completed with exit code 1.

The "--output" option isn't supported when building a solution. Specifying a solution-level output path results in all projects copying outputs to the same directory, which can lead to inconsistent builds.

The switch expression does not handle all possible values of its input type (it is not exhaustive). For example, the pattern '_' is not covered. However, a pattern with a 'when' clause might successfully match this value.

Converting null literal or possible null value to non-nullable type.

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

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

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

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

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

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