The style of horizontal grid lines.
OptionValue can be set to one of the following valid options:
|None||No horizontal grid lines|
|DotSmall||Horizontal grid lines composed of small dots|
|DotLarge||Horizontal grid lines composed of large dots|
|Dash||Horizontal grid lines composed of dashes|
|Solid||Solid horizontal grid lines|
The HorizontalGridStyle property establishes the how horizontal grid lines are rendered. To remove horizontal grid lines, set this to "None". The default is "Solid" grid lines. This property only affects horizontal grid lines. To change vertical grid lines, use VerticalGridStyle.