Free ASP.NET MVC hosting, AppHarbor

http://support.appharbor.com/kb/getting-started/deploying-your-first-application-using-git

How to set maxlength for a Textbox in MVC3?

In model add following attribute:
        [StringLength(30, ErrorMessage = "Name cannot be longer than 30 characters.")]
        public string Name { get; set; }

Try a couple of others way, doesn’t work:

@Html.EditorFor(model => model.Name, new { @maxlength = "2" })
$(“#name”).attr(“maxlength”,20);

How to solve "Unable to copy file because it is being used by another process" in ASP.NET

If your ASP.NET solution suddenly cannot compile successfully like before, get following error
“Unable to copy file because it is being used by another process”
Go to Task Manager, and kill all of processes that name "WebDev.WebServer40.exe"