Mscorlib.dll in .Net

mscorlib.dll is an assembly which contains the most basic types needed by any .NET application.

It includes the built-in types (Int32, Double, Boolean, Char, String etc), the basic collection types (Array, ArrayList, Hashtable, List, Dictionary etc) and the types used for file/ stream processing, serialization, threading, reflection and interop with native code.

mscorlib.dll is a module associated with .NET Compact Framework from Microsoft Corporation. Non-system processes like mscorlib.dll originate from software you installed on your system. Since most applications store data in your system's registry, it is likely that your registry has suffered fragmentation and accumulated invalid entries which can affect your PC's performance. It is recommended that you check your registry to identify slowdown issues.
mscorlib.dll