public void ApplyVisualStyle(string visualStyle) { if (visualStyle == "Classic") { var theme = new VS2005Theme(); dockPanel.Theme = theme; theme.ApplyTo(dockPanel); ToolStripManager.Renderer = VisualStyles.SystemToolStripRenderers.ToolStripSquaredEdgesRenderer; ToolStripManager.VisualStylesEnabled = false; } else if (visualStyle == "Light") { var theme = new VS2015LightTheme(); dockPanel.Theme = theme; theme.ApplyTo(dockPanel); ToolStripManager.VisualStylesEnabled = true; ToolStripManager.Renderer = new VisualStyles.VS2012ToolStripRenderer(); } else // Blue { var theme = new VS2015BlueTheme(); dockPanel.Theme = theme; theme.ApplyTo(dockPanel); ToolStripManager.VisualStylesEnabled = true; ToolStripManager.Renderer = new VisualStyles.VS2015ToolStripRenderer(); } }