如何通过appsettings/configuration传递请求正文限制属性值？

"RequestLimits": {
  "MaxRequestBodySize": "1048576",
  "MaxRequestBufferSize": "8192"
}

var maxRequestBodySize = Configuration.GetSection("RequestLimits:MaxRequestBodySize").Value;
var maxRequestBufferSize = Configuration.GetSection("RequestLimits:MaxRequestBufferSize").Value;

app.Use(async (context, next) =>
{
    context.Request.BodyReader = context.Request.BodyReader.AsStream(maxRequestBodySize);
    context.Request.BodyWriter = context.Request.BodyWriter.AsStream(maxRequestBufferSize);
    await next.Invoke();
});