Hi Pankaj,
It is possible to Specify the axis values to start with 0 with Interval 3.5 using the ChartAxis.Range as given below.
Sample code:
this.chart.PrimaryXAxis.RangeType = ChartAxisRangeType.Set;
this.chart.PrimaryXAxis.Range = new MinMaxInfo(0, 28, 3.5);
or
this.chart.PrimaryXAxis.Range.Min = 0;
this.chart.PrimaryXAxis.Range.Max = 28;
this.chart.PrimaryXAxis.Range.Interval = 3.5;
I have attached the sample illustrating the same in this link below.
http://websamples.syncfusion.com/samples/Chart.Windows/F74904/main.htmPlease let us knwo if this meets your requirement.
Regarding your second query:
I am unable find the attachment in your previous update. Could you please reattach your Screenshot? SO that it will be more helpful for us to analyze and provide you with better solution at the earliest.
Thanks for your patience.
Regards,
Manohari.R