The specified version string '1.2.1.*' does not conform to the recommended format - major.minor.build.revision

The specified version string '1.2.1.*' does not conform to the recommended format - major.minor.build.revision

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

'Line' overrides Object.Equals(object o) but does not override Object.GetHashCode()

'Line' defines operator == or operator != but does not override Object.GetHashCode()

'Lines.this[int]' hides inherited member 'List<Line>.this[int]'. Use the new keyword if hiding was intended.

Nullability of reference types in type of parameter 'other' of 'bool Lines.Equals(Lines other)' doesn't match implicitly implemented member 'bool IEquatable<Lines>.Equals(Lines? other)' (possibly because of nullability attributes).

Cannot convert null literal to non-nullable reference type.

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