public void TestGetDoubleWithIsDBNullCheck()
{
var reader = new ListDataReader <Student>(_Students);
reader.Read();
var col = "Double2";
Assert.Equal(4.4, reader.GetDoubleWithNull(col).Value);
reader.Read();
Assert.False(reader.GetDoubleWithNull(col).HasValue);
reader.Read();
Assert.Equal(5.5, reader.GetDoubleWithNull(col).Value);
}