cleanupAdd project files.

Program.cs

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+using Svg;
+using System.Runtime.InteropServices;
+using System.Text;
+using System.Text.Json;
+
+namespace McsrGraphImageDownloader;
+
+internal class Program {
+    [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
+    public static extern int SystemParametersInfo(int uAction, int uParam, string lpvParam, int fuWinIni);
+    public const int SPI_SETDESKWALLPAPER = 20;
+    public const int SPIF_UPDATEINIFILE = 1;
+    public const int SPIF_SENDCHANGE = 2;
+    private const string outputFilename = "mcsrChart.png";
+
+    private static async Task Main(string[] args) {
+        using var hc = new HttpClient();
+        while (true) {
+            var svgJson = await hc.GetStringAsync("https://mcsr.ghxx.dev/api/chart");
+            var svgText = JsonDocument.Parse(svgJson).RootElement.GetProperty("data").GetString();
+            var svg = SvgDocument.Open<SvgDocument>(new MemoryStream(Encoding.UTF8.GetBytes(svgText!)));
+            using (var bitmap = svg.Draw(1920, 1080)) {
+                bitmap.Save(outputFilename);
+            }
+            SystemParametersInfo(SPI_SETDESKWALLPAPER, 0, Path.GetFullPath(outputFilename), SPIF_UPDATEINIFILE | SPIF_SENDCHANGE);
+
+            await Task.Delay(TimeSpan.FromMinutes(15));
+        }
+    }
+}