可能是全网最完整的 C# 版微信 SDK

# 通过 NuGet 安装
> Install-Package SKIT.FlurlHttpClient.Wechat.Api
# 通过 dotnet-tools 安装
> dotnet add package SKIT.FlurlHttpClient.Wechat.Api

using SKIT.FlurlHttpClient.Wechat;
using SKIT.FlurlHttpClient.Wechat.Api;
var options = new WechatApiClientOptions()
{
    AppId = "微信 AppId",
    AppSecret = "微信 AppSecret",
    ImmeDeliveryAppKey = "即时配送相关服务 AppKey，不用则不填",
    ImmeDeliveryAppSecret = "即时配送相关服务 AppSecret，不用则不填",
    MidasOfferId = "米大师（虚拟支付 1.0）相关服务 OfferId，不用则不填",
    MidasOfferIdV2 = "米大师（虚拟支付 2.0）相关服务 OfferId，不用则不填",
    MidasAppKey = "米大师（虚拟支付 1.0）相关服务 AppKey，不用则不填",
    MidasAppKeyV2 = "米大师（虚拟支付 2.0）相关服务 AppKey，不用则不填"
};
var client = new WechatApiClient(options);

using SKIT.FlurlHttpClient.Wechat.Api;
using SKIT.FlurlHttpClient.Wechat.Api.Models;
/* 以公众号获取用户信息接口为例 */
var request = new CgibinUserInfoRequest()
{
    AccessToken = "微信 AccessToken",
    OpenId = "微信 OpenId"
};
var response = await client.ExecuteCgibinUserInfoAsync(request);
if (response.IsSuccessful())
{
    Console.WriteLine("昵称：" + response.Nickname);
    Console.WriteLine("头像：" + response.HeadImageUrl);
}
else
{
    Console.WriteLine("错误代码：" + response.ErrorCode);
    Console.WriteLine("错误描述：" + response.ErrorMessage);
}