Line only draw a X axis when property/field name of data object is capitalize

Hi,

Follows samples in
https://antblazor.com/en-US/charts/line#components-line-demo-multiple-line

If I create the config as below
private LineConfig countingChartConfig = new LineConfig
{
....................
XField = "Date",
YField = "Value",
SeriesField = "Name",
...........................................
};
and my data object is:
{
public string Date;
public string Value;
public string Name;
}
When the program runs, it only draws a X axis

It works well when lowercase the first letter of filed names.