Entity Framework Error: Validation failed for one or more entities


While running on C# app using Entity Framework, me came me the issue Validation failed for one or more entities. Today, I've prepared a whole solution to conquer issue Validation failed for one or more entities while playing with Entity Framework (MS SQL Server database) using C#, MVC, ASP.Net, etc. Recently, I've absolutely explained entity framework error Store update insert or delete statement affected an unexpected number of rows (0)  in my recent article, this day going to resolve another one entity framework error Validation failed for one or more entities.


SMTP Server: Authentication the Server Response was 5.5.1 Authentication required in gmail


I was working on MVC (C#) application sending email through Gmail Server, meanwhile popped up me issue the server response was 5.5.1 authentication required, So we required action to set on security issue which is default off in Gmail Email settings. I have published an article on How to send SMS using C#, now a days it has become very necessary to integrate SMS API into our application.

Error Description

An exception of type 'System.Net.Mail.SmtpException' occurred in System.dll but was not handled in user code
Additional information: The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required.


Internet Browser: Internet Explorer replacing with Microsoft Edge in Windows 10


Microsoft has initiated replacing Internet Explorer with Microsoft Edge in Windows 10 operating System. Microsoft Edge is totally skilled to run web applications consistently over numerous gadgets. Microsoft Edge is tad bit lighter to different programs (Chrome, Firefox, Opera and so forth.). In this article has shown difference between internet explorer vs microsoft edge.

Cutting off ActiveX and BHOs

ActiveX are dropping off by new look of Microsoft Edge substituting of old Internet Explorer.
ActiveX contains essentially module of Flash, Silver light, Java and PDF modules. Fundamental motivation to dropping off ActiveX is to fall off completely of HTML 5 of today splendid interest to run the substance over web program over the numerous gadgets.
Presently flash will work alike same as Chrome gives, now Microsoft Edge will organize PDF in its local dialect.

SQL Error: Saving Changes not permitted in SQL Server


Today, I am explaining about error saving Changes is not permitted in MS SQL Server, to authorize this permission you have to un-check check box under Tools >> Options menus. If we keep it checked then it will not allow us to change data type during the development so that we require to frequent change or specific requirement then we required it immediately.

Error Description

Saving changes is not permitted. The changes you have made require the following tables to be dropped and re-created. You have either made changes to a table that can't be re-created or enabled the option Prevent saving changes that require the table to be re-created.

Saving Changes not permitted in SQL Server