Grid lines are lines that appear perpendicular with major/minor tick marks at unit major/minor intervals. Grid lines can help improve the readability of the Chart when you are looking for exact values.
To paint or fill the major/minor grid lines
You can apply a color to major/minor grid lines using the Axis.MajorGridStroke/Axis.MinorGridStroke properties. A fill color can be applied in between each value of the major grid lines using the Axis.MajorGridFill properties.
To set the dash pattern for major/minor grid lines
You can set the dash pattern for major/minor grind lines using the Axis.MajorGridStrokeDashes/Axis.MinorGridStrokeDashes property.
To set the thickness for major/minor grid lines
You can specifiy the thickness for major/minor grid lines using the Axis.MajorGridStrokeThickness/Axis.MinorGridStrokeThickness properties.
To set the fill for major grid lines
You can apply a fill for the major gridlines using the Axis.MajorGridFill property.