Store update, insert, or delete statement affected an unexpected number of rows (0). Entities may have been modified or deleted since entities were loaded. See http://go.microsoft.com/fwlink/?LinkId=472540 for information on understanding and handling optimistic concurrency exceptions. Programlama yaparken bazen karşıma çıkan hataları ...

Asp.net MD5 şifreleme örneği     using System.Web.Security; public static string MD5Olustur(string veri) { return FormsAuthentication.HashPasswordForStoringInConfigFile(veri,MD5); } string deger= MD5Olustur(UserNametxt.Text);