What is mscorlib.ni.dll?
The genuine mscorlib.ni.dll file is a software component of Microsoft .NET Framework by Microsoft Corporation.
"Mscorlib.ni.dll" is a "native image" of "mscorlib.dll", the Microsoft .NET Framework's Common Language Runtime (CLR) Class Library, containing machine-executable code compiled by "ngen.exe" from Common Intermediate Language (CIL) specifically for the local processor and architecture and stored in the Native Image Cache (NIC). The NIC is in "C:\Windows\assembly\NativeImages_<CLRversion>_<arch>". Once "Mscorlib.ni.dll" is installed in the NIC only "ngen.exe" or the Native Image Service can uninstall it. "Mscorlib.dll" or its native image is not itself the CLR but contains indispensable resources for it and must always be exactly the same version. (The CLR is in mscorwks.dll on all single-processor workstations; a parallel "mscorsvr.dll" edition exists for servers.) Its content is changed by Microsoft's CLR developers as versions progress and the "mscorlib.dll" for Silverlight is smaller. Microsoft Corporation, founded April 4, 1975, by Paul Allen and Bill Gates, was in 2016 the world software producer with the largest revenue.
MsCoRLib stands for Microsoft Common Language Runtime Library
Mscorlib.ni.dll is a Windows DLL file. DLL is the abbreviation for Dynamic Link Library. DLL files are needed by programs or web browser extensions, because they contain program code, data, and resources.
The following information can help you determine if mscorlib.ni.dll is a Windows system file or if it belongs to an application that you can trust.
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Mscorlib.ni.dll file information
The process known as Microsoft Common Language Runtime Class Library belongs to software Microsoft .NET Framework by Microsoft (www.microsoft.com).
Description: Mscorlib.ni.dll is not essential for Windows and will often cause problems. Mscorlib.ni.dll is located in a subfolder of C:\Windows—in most cases C:\Windows\assembly\NativeImages_v2.0.50727_32\mscorlib\dae02331a443fb52216ca83292cb2f21\ or C:\Windows\assembly\NativeImages_v4.0.30319_32\mscorlib\d1265d6159ea876f9d63ea4c1361b587\.
Known file sizes on Windows 11/10/7 are 13,179,660 bytes (38% of all occurrences), 11,497,984 bytes and 5 more variants. 
A .dll file (Dynamic Link Library) is a special type of Windows program containing functions that other programs can call. This .dll file can be injected to all running processes and can change or manipulate their behavior.
The program has no visible window. The service has no detailed description. It can change the behavior of other programs or manipulate other programs. The file is not a Windows core file.
Therefore the technical security rating is 64% dangerous; but you should also compare this rating with the user reviews.
Recommended: Identify mscorlib.ni.dll related errors
Important: Some malware camouflages itself as mscorlib.ni.dll. Therefore, you should check the mscorlib.ni.dll process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.
Best practices for resolving mscorlib issues
A clean and tidy computer is the key requirement for avoiding problems with mscorlib. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic Update. Always remember to perform periodic backups, or at least to set restore points.
Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the 6resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.
To get your computer running as fast as it did on day one, you can 8reset your PC. Your personal files will remain intact, but any programs you installed will need to be reinstalled.
To help you analyze the mscorlib.ni.dll process on your computer, the following programs have proven to be helpful: ASecurity Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. A good Bantivirus software detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.
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Score
User Comments
nanashi (further information)
mizzletopff
Kurtar
Summary: Average user rating of mscorlib.ni.dll: based on 3 votes with 3 user comments. 3 users suspect danger.