public Guid?Read(ISqDataRecordReader recordReader, int ordinal) => !recordReader.IsDBNull(ordinal) ? recordReader.GetGuid(ordinal) : null;
public Guid Read(ISqDataRecordReader recordReader) => recordReader.GetGuid(this.ColumnName.Name);
public Guid Read(ISqDataRecordReader recordReader, int ordinal) => recordReader.GetGuid(ordinal);