I'm super excited to share this:

ManagedEsent is documented on MSDN:

http://msdn.microsoft.com/en-us/library/windows/desktop/dn375980.aspx

And it's part of Windows 8.1. No need to download from CodePlex! Here's what's on my 8.1 machine:

C:\Windows\assembly\NativeImages_v4.0.30319_32\Microsoft.Ic1a2041b#\3862e50725b3d2f5ef48c19f24b17ef3\Microsoft.Isam.Esent.Interop.ni.dll
C:\Windows\assembly\NativeImages_v4.0.30319_32\Microsoft.Ic1a2041b#\3862e50725b3d2f5ef48c19f24b17ef3\Microsoft.Isam.Esent.Interop.ni.dll.aux
C:\Windows\assembly\NativeImages_v4.0.30319_64\Microsoft.Ic1a2041b#\85216777bd911aef15b30bda8b0046b8\Microsoft.Isam.Esent.Interop.ni.dll
C:\Windows\assembly\NativeImages_v4.0.30319_64\Microsoft.Ic1a2041b#\85216777bd911aef15b30bda8b0046b8\Microsoft.Isam.Esent.Interop.ni.dll.aux
C:\Windows\Microsoft.NET\assembly\GAC_MSIL\microsoft.isam.esent.interop\v4.0_6.3.0.0__31bf3856ad364e35\Microsoft.Isam.Esent.Interop.dll
C:\Windows\WinSxS\msil_microsoft.isam.esent.interop_31bf3856ad364e35_6.3.9600.16384_none_b4cbc5488cc56490\Microsoft.Isam.Esent.Interop.dll

 

Enjoy!

-martin