ASP.NET Page not load correctly

We have a problem in ASP.NET page. I have a project create in asp.net , when it run in local host it works well but when I upload the project in host , when I have modify some file like send.aspx.cs it changed but not effected in website. I have try many ways such as clear cache , check Cloudflare , ... but this problem did not solved

Please help me and suggest your solutions

thx and regards