How to modify dynamically added configuration settings at runtime in WinForms SyntaxEditor (EditControl)?
Configuration settings
You could simply modify the dynamically added configuration settings at runtime by getting the associated ISnippetFormat object and setting its appropriate properties.
C#
ISnippetFormat formatMethod = this.editControl1.Language["MethodName"] as ISnippetFormat;
formatMethod.FontColor = Color.Orange;
formatMethod.Font = new Font("Garamond",12, FontStyle.Bold | FontStyle.Italic);
VB
Dim formatMethod As ISnippetFormat = Me.editControl1.Language("MethodName")
formatMethod.FontColor = Color.Orange
formatMethod.Font = New Font("Garamond", 12, FontStyle.Bold Or FontStyle.Italic)
Reference link: https://help.syncfusion.com/windowsforms/syntax-editor/syntax-highlighting#configure-custom-language-using-code