Refactor "In"-Expression - #988

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Nullability of reference types in value of type 'Task<dynamic?>' doesn't match target type 'Task<dynamic>'.

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

Dereference of a possibly null reference.

Dereference of a possibly null reference.

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

Nullability of reference types in value of type 'object?[]' doesn't match target type 'object[]'.

Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

Targeting .NET Standard prior to 2.0 is no longer recommended. See https://aka.ms/dotnet/dotnet-standard-guidance for more details.

Non-nullable property 'Items' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.

Possible null reference argument for parameter 'y' in 'bool EqualityComparer<TValue>.Equals(TValue x, TValue y)'.

Non-nullable property 'Args' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.

Non-nullable property 'Parameters' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.

Non-nullable property 'MethodBase' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.

Non-nullable property 'Items' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.

Possible null reference argument for parameter 'x' in 'bool EqualityComparer<TValue>.Equals(TValue x, TValue y)'.

Possible null reference argument for parameter 'y' in 'bool EqualityComparer<TValue>.Equals(TValue x, TValue y)'.

Targeting .NET Standard prior to 2.0 is no longer recommended. See https://aka.ms/dotnet/dotnet-standard-guidance for more details.