How to customize chart legend items in WinForms Chart?

To create a fully custom legend in WinForms Charts, first create and style one or more ChartLegendItem, customizing their text, symbols, and colors. Then, assign an array containing these custom items to the CustomItems property. This action completely replaces the default, auto-generated legend with your custom entries.

ChartLegendItem legendItem1 = new ChartLegendItem();
legendItem1.ItemStyle.ShowSymbol = true;
legendItem1.ItemStyle.Symbol.Shape = ChartSymbolShape.Pentagon;
legendItem1.ItemStyle.Symbol.Size = new Size(15, 15);
legendItem1.ItemStyle.Symbol.Color = Color.RoyalBlue;
legendItem1.Text = "Sales";
legendItem1.IconAlignment = LeftRightAlignment.Left;
legendItem1.ItemStyle.TextColor = Color.RoyalBlue;
legendItem1.ItemStyle.Font = new Font("Verdana", 10f, FontStyle.Italic);
legendItem1.ShowShadow = false;

ChartLegendItem legendItem2 = new ChartLegendItem(); legendItem2.ItemStyle.ShowSymbol = true;
legendItem2.ItemStyle.Symbol.Shape = ChartSymbolShape.Hexagon;
legendItem2.ItemStyle.Symbol.Size = new Size(15, 15);
legendItem2.ItemStyle.Symbol.Color = Color.Red;
legendItem2.Text = "Y Value";
legendItem2.IconAlignment = LeftRightAlignment.Left;
legendItem2.ItemStyle.TextColor = Color.Red;
legendItem2.ItemStyle.Font = new Font("Verdana", 10f, FontStyle.Italic);
legendItem2.ShowShadow = false;

this.chartControl1.Legends[0].CustomItems = new ChartLegendItem[] { legendItem1, legendItem2 };

Dim legendItem1 = New ChartLegendItem()
legendItem1.ItemStyle.ShowSymbol = True
legendItem1.ItemStyle.Symbol.Shape = ChartSymbolShape.Pentagon
legendItem1.ItemStyle.Symbol.Size = New Size(15, 15)
legendItem1.ItemStyle.Symbol.Color = Color.RoyalBlue
legendItem1.Text = "Sales"
legendItem1.IconAlignment = LeftRightAlignment.Left
legendItem1.ItemStyle.TextColor = Color.RoyalBlue
legendItem1.ItemStyle.Font = New Font("Verdana", 10.0F, FontStyle.Italic)
legendItem1.ShowShadow = False

Dim legendItem2 = New ChartLegendItem()
legendItem2.ItemStyle.ShowSymbol = True
legendItem2.ItemStyle.Symbol.Shape = ChartSymbolShape.Hexagon
legendItem2.ItemStyle.Symbol.Size = New Size(15, 15)
legendItem2.ItemStyle.Symbol.Color = Color.Red
legendItem2.Text = "Y Value"
legendItem2.IconAlignment = LeftRightAlignment.Left
legendItem2.ItemStyle.TextColor = Color.Red
legendItem2.ItemStyle.Font = New Font("Verdana", 10.0F, FontStyle.Italic)
legendItem2.ShowShadow = False

lineChart.Legends(0).CustomItems = New ChartLegendItem() {legendItem1, legendItem2}