Hi Vinod,
Thank you very much for your interest on Syncfusion products.
I am afraid that i could not able to reproduce the reported issue at our side. I have created a sample with reference to the code snippet posted in your last update and tested the sample with our latest assemblies 8.2.0.18 Ver(Volume 2Release), Could you please get and try the sample with the assemblies from the attachment and let us know if this solves your issue and for your reference, i have added the chart types that supports the Floor property.
ExcelChartType.Column_3D,
ExcelChartType.Column_Clustered_3D,
ExcelChartType.Column_Stacked_100_3D,
ExcelChartType.Column_Stacked_3D,
ExcelChartType.Bar_Clustered_3D,
ExcelChartType.Bar_Stacked_3D,
ExcelChartType.Bar_Stacked_100_3D,
ExcelChartType.Line_3D,
ExcelChartType.Area_3D,
ExcelChartType.Area_Stacked_3D,
ExcelChartType.Area_Stacked_100_3D,
ExcelChartType.Cylinder_Clustered,
ExcelChartType.Cylinder_Stacked,
ExcelChartType.Cylinder_Stacked_100,
ExcelChartType.Cylinder_Bar_Clustered,
ExcelChartType.Cylinder_Bar_Stacked,
ExcelChartType.Cylinder_Bar_Stacked_100,
ExcelChartType.Cylinder_Clustered_3D,
ExcelChartType.Cone_Clustered,
ExcelChartType.Cone_Stacked,
ExcelChartType.Cone_Stacked_100,
ExcelChartType.Cone_Bar_Clustered,
ExcelChartType.Cone_Bar_Stacked,
ExcelChartType.Cone_Bar_Stacked_100,
ExcelChartType.Cone_Clustered_3D,
ExcelChartType.Pyramid_Clustered,
ExcelChartType.Pyramid_Stacked,
ExcelChartType.Pyramid_Stacked_100,
ExcelChartType.Pyramid_Bar_Clustered,
ExcelChartType.Pyramid_Bar_Stacked,
ExcelChartType.Pyramid_Bar_Stacked_100,
ExcelChartType.Pyramid_Clustered_3D,
ExcelChartType.Surface_3D,
ExcelChartType.Surface_NoColor_3D
Please, let us know if you need more clarifications.
Thanks,
Lokesh
Forum-94004_9d414142.zip