Operation is not valid due to current state of the object -- Elevated Privileges

Exception

ExceptionType=System.InvalidOperationExceptionJSON
Message=Operation is not valid due to the current state of the object.

Cause: 

I tried to call SPUtility.SendEmail within the RunWithElevatedPrivileges delegate.

Comments

If i try to run this method out of Elevated delegate, it works fine. All the other things that are working fine in Elevated Privileges (except send email) are,

1. SPUtility.GetPrincipalsInGroup
2. spWeb.EnsureUser

How to set InfoPath field value on dropdown change event in SharePoint 2010 and 2013

Problem

We have a Dropdown in InfoPath which is populated from external data source (SharePoint List. e.g. TimeSheet List having fields ProjectName, %Complete and Type. Dropdown is showing Project Names). We want to populate infopath field (Type) from SharePoint based on selected Project in dropdown.

Solution

I suppose you have already Filled Dropdown from Timesheet List and or applied filtering if required, If not, you can follow my post How to Filter Infopath Dropdown.

Select the Project dropdown that we created in previous article and from the "Home" ribbon, select Add Rule->This Field Changes -> Set a Field's Value option as shown in the below image.

How to Populate and Filter InfoPath Dropdown Populating from SharePoint List

Problem

We have TimeSheet SharePoint List which has information of all the projects, their status and % Complete. We want to populate dropdown with TimeSheet projects whose status is not closed.

Solution

Populating Dropdown

First Create the List as following,

Now in the InfoPath Designer (It does not matter if it is list template or designing new InfoPath document), Add dropdown list from menu bar,