How can we resolve "Cannot Edit an Item Outside of the transaction" in LightSwitch?

Some times when we want to Add Data Item in LightSwitch. Then we face following type of error.
       "Cannot Edit an Item Outside of the transaction"

To resolve this Close your solution by clicking on the Close Solution in the file tab.

After that open your application again and try to add data item. This time you will not see this any type of error at the time of adding new Add Data Item.