如何在C#的google sheets api v4中读取CellFormat？

using Google.Apis.Auth.OAuth2;
using Google.Apis.Services;
using Google.Apis.Sheets.v4;
using Google.Apis.Sheets.v4.Data;

GoogleCredential credential;
using (var stream = new FileStream("credentials.json", FileMode.Open, FileAccess.Read))
{
    credential = GoogleCredential.FromStream(stream)
        .CreateScoped(SheetsService.Scope.Spreadsheets);
}

// 实例化Sheets服务
var service = new SheetsService(new BaseClientService.Initializer()
{
    HttpClientInitializer = credential,
    ApplicationName = "Your Application Name"
});

string spreadsheetId = "your-spreadsheet-id";
string range = "Sheet1!A1"; // 读取的单元格范围

// 构建请求
SpreadsheetsResource.GetRequest request = service.Spreadsheets.Get(spreadsheetId);
request.Ranges = range;
request.IncludeGridData = true;

// 发送请求并获取响应
Spreadsheet response = request.Execute();

// 解析响应，获取单元格格式
var cellFormat = response.Sheets[0].Data[0].RowData[0].Values[0].EffectiveFormat;

var backgroundColor = cellFormat.BackgroundColor;
var textFormat = cellFormat.TextFormat;
var horizontalAlignment = cellFormat.HorizontalAlignment;
// 其他属性...

// 示例：获取背景颜色
if (backgroundColor != null)
{
    var red = backgroundColor.Red;
    var green = backgroundColor.Green;
    var blue = backgroundColor.Blue;
    // 使用颜色值进行操作...
}