.Net CF 3.5: Unable to read project file, C:\Windows\Microsoft.NET\Framework\v3.5\Microsoft.CompactFramework.CSharp.targets OR (VisualBasic) was not foundWind

I encountered this problem after I upgraded the Windows 7 OS to Windows 10 OS and opened the stable .NET 3.5 Compact Framework Solution.

Below is the screenshot of the error message shown in Visual Studio:


To get rid of this error you must install the .Net Compact Framework PowerToys into your Windows 10 OS!!

Follow this link to install it: https://www.microsoft.com/en-us/download/confirmation.aspx?id=13442