In Entity Framework, this sometimes occurs when the
System.data.entity assembly is not added into the Project. But, why I didn't have this error before in other MVC project.
it occurs sometimes but frequently and I have to add it manually in Add References. What can I do?
I fixed this issue as below
using System.Data; using System.Data.Entity;
I was working earlier in ASP.Net MVC C# application working fine for me. I fixed this issue as below
I was working earlier in ASP.Net MVC C# application working fine for me
_context.Entry(_Teach).State = System.Data.EntityState.Modified;
Now, same method using in simple c#, WCF but it giving me issue then I did this in a way as below:
_context.Entry(_Teach).State = EntityState.Modified;
(Not sure what's going on. Did Microsoft change the package?)