Possible null reference argument for parameter 's' in 'DateTime DateTime.Parse(string s)'.

Possible null reference argument for parameter 's' in 'int int.Parse(string s)'.

Possible null reference argument for parameter 's' in 'DateTime DateTime.Parse(string s)'.

Possible null reference argument for parameter 'key' in 'CountPerKey.CountPerKey(string key, int count)'.

Possible null reference argument for parameter 's' in 'int int.Parse(string s)'.

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

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

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

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