public void Remove(VisualMarker marker)
{
if (marker == null)
{
throw new ArgumentNullException(nameof(marker));
}
this.markers.Remove(marker);
}
public VisualMarker TryAdd(int start, int length)
{
var textLength = this.editor.Document.TextLength;
if (start < 0 || length > textLength)
{
return(null);
}
if (length < 0 || start + length > textLength)
{
return(null);
}
var marker = new VisualMarker(this, start, length);
this.markers.Add(marker);
return(marker);
}
