radzen-blazor/RadzenBlazorDemos/Pages/MultipleAxesChartConfig.razor

<RadzenStack class="rz-p-0 rz-p-md-6 rz-p-lg-12">
    <RadzenRow>
        <RadzenColumn Size="12">
            <RadzenChart Style="height: 400px">
                <RadzenColumnSeries FillMode="FillMode.Gradient" Data="@data" CategoryProperty="Month" ValueProperty="Revenue" Title="Revenue ($)"
                    Fill="var(--rz-series-1)" Stroke="var(--rz-series-1)" />
                <RadzenLineSeries Data="@data" CategoryProperty="Month" ValueProperty="Orders" Title="Orders" ValueAxisName="orders"
                    Stroke="var(--rz-series-4)">
                    <RadzenMarkers MarkerType="MarkerType.Triangle" Fill="var(--rz-series-4)" Stroke="var(--rz-series-4)" />
                </RadzenLineSeries>
                <RadzenCategoryAxis />
                <RadzenValueAxis>
                    <RadzenAxisTitle Text="Revenue ($)" />
                    <RadzenGridLines Visible="true" />
                </RadzenValueAxis>
                <RadzenValueAxis Width="50" Name="orders">
                    <RadzenAxisTitle Text="Order Count" />
                </RadzenValueAxis>
                <RadzenLegend Position="LegendPosition.Bottom" />
            </RadzenChart>
        </RadzenColumn>
    </RadzenRow>
</RadzenStack>

@code {
    class MultiAxisData
    {
        public string Month { get; set; } = "";
        public double Revenue { get; set; }
        public double Orders { get; set; }
    }

    MultiAxisData[] data = new MultiAxisData[]
    {
        new MultiAxisData { Month = "Jan", Revenue = 234000, Orders = 42 },
        new MultiAxisData { Month = "Feb", Revenue = 284000, Orders = 55 },
        new MultiAxisData { Month = "Mar", Revenue = 274000, Orders = 48 },
        new MultiAxisData { Month = "Apr", Revenue = 310000, Orders = 63 },
        new MultiAxisData { Month = "May", Revenue = 298000, Orders = 59 },
        new MultiAxisData { Month = "Jun", Revenue = 356000, Orders = 71 },
    };
}