Error :

Unable to install .NET Framework 4.5 using dotNetFx45_Full_setup.exe installer without internet connection in server

Resolution :

Go to windows command prompt  ( Click on Start -> Run -> Type cmd -> Press OK )

Type tasklist /m and Press enter

The above command will list all the process i.e exe and dlls each process is using

Find out which process i.e exe is using the dll XYZ.dll

Then go to Task Manager and End the process

Error : Unable to generate a temporary class (result=1). error CS2001: Source file

Solution : Provide full access to the user to C:WindowsTemp folder

The type or namespace name ‘ScriptManager’ does not exist in the namespace ‘System.Web.UI’ (are you missing an assembly reference?)

Error Details :

Getting above error on addition ScriptManager to .aspx page

Solution :

Add the System.Web.Extensions.dll reference to project to resolve above error.