Dereference of a possibly null reference.

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

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

Possible null reference argument for parameter 'elementType' in 'Array Array.CreateInstance(Type elementType, int length)'.

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

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

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

'Entity.Id' hides inherited member 'EntityBase<int>.Id'. To make the current member override that implementation, add the override keyword. Otherwise add the new keyword.

Cannot convert null literal to non-nullable reference type.