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How to customize the appearance of the selector in Blazor Diagram?
A Blazor Diagram (SfDiagramComponent) has a predefined style for the selector that you can customize using style properties such as stroke and stroke-dasharray of the diagram border class.
Refer to the following code example to learn how to change the stroke, stroke-dasharray of the selector, and the fill and stroke color of the resizer thumbs:
<style>
.e-diagram-border {
stroke: transparent;
stroke-dasharray: 1,1
}
.e-diagram-resize-handle {
fill: orange;
stroke: orange;
}
</style>
Screenshot:

Sample link: https://www.syncfusion.com/downloads/support/directtrac/general/ze/SelectorSample1182193618.zip