'string' does not contain a definition for 'Description' and no accessible extension method 'Description' accepting a first argument of type 'string' could be found (are you missing a using directive or an assembly reference?)

'string' does not contain a definition for 'Description' and no accessible extension method 'Description' accepting a first argument of type 'string' could be found (are you missing a using directive or an assembly reference?)

'string' does not contain a definition for 'Description' and no accessible extension method 'Description' accepting a first argument of type 'string' could be found (are you missing a using directive or an assembly reference?)

'string' does not contain a definition for 'Description' and no accessible extension method 'Description' accepting a first argument of type 'string' could be found (are you missing a using directive or an assembly reference?)

'string' does not contain a definition for 'Description' and no accessible extension method 'Description' accepting a first argument of type 'string' could be found (are you missing a using directive or an assembly reference?)

'string' does not contain a definition for 'Description' and no accessible extension method 'Description' accepting a first argument of type 'string' could be found (are you missing a using directive or an assembly reference?)

'string' does not contain a definition for 'Description' and no accessible extension method 'Description' accepting a first argument of type 'string' could be found (are you missing a using directive or an assembly reference?)

'string' does not contain a definition for 'AlternateAlleleString' and no accessible extension method 'AlternateAlleleString' accepting a first argument of type 'string' could be found (are you missing a using directive or an assembly reference?)

'string' does not contain a definition for 'ReferenceAlleleString' and no accessible extension method 'ReferenceAlleleString' accepting a first argument of type 'string' could be found (are you missing a using directive or an assembly reference?)

'string' does not contain a definition for 'Description' and no accessible extension method 'Description' accepting a first argument of type 'string' could be found (are you missing a using directive or an assembly reference?)

The annotation for nullable reference types should only be used in code within a '#nullable' annotations context.

The annotation for nullable reference types should only be used in code within a '#nullable' annotations context.

The annotation for nullable reference types should only be used in code within a '#nullable' annotations context.

'ProteinDbLoader.LoadProteinXML(string, bool, DecoyType, IEnumerable<Modification>, bool, IEnumerable<string>, out Dictionary<string, Modification>, int, int, int, bool)' is obsolete: 'This overload preserves the legacy parameter order and will be removed in a future release. Use the options-based overload or the signature with variant parameters grouped before addTruncations.'

'PeptideWithSetModifications.SequenceVariantString(SequenceVariation, bool)' is obsolete: 'intersects parameter is unused. Call SequenceVariantString(SequenceVariation) without the second argument.'

The annotation for nullable reference types should only be used in code within a '#nullable' annotations context.

The annotation for nullable reference types should only be used in code within a '#nullable' annotations context.

The annotation for nullable reference types should only be used in code within a '#nullable' annotations context.

The annotation for nullable reference types should only be used in code within a '#nullable' annotations context.

The annotation for nullable reference types should only be used in code within a '#nullable' annotations context.

Possible null reference argument for parameter 'source' in 'IEnumerable<List<T>> Enumerable.Where<List<T>>(IEnumerable<List<T>> source, Func<List<T>, bool> predicate)'.

Dereference of a possibly null reference.

Possible null reference argument for parameter 'item' in 'void List<IIndexedPeak>.Add(IIndexedPeak item)'.

Nullable value type may be null.

The annotation for nullable reference types should only be used in code within a '#nullable' annotations context.

The annotation for nullable reference types should only be used in code within a '#nullable' annotations context.

The annotation for nullable reference types should only be used in code within a '#nullable' annotations context.

Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.