The .NET Runtime library for the Delphi is known to be the best library to work with the framework of .NET and the libraries of .Net right from the Delphi. It is designed to provide a way and manner to the user to interact with the applications that are written in any one of the languages that belong to the .NET as visual basics .NET, Delphi .NET, JavaScript .NET, and a few more from Delphi. Since it was originally introduced and announced the community of the Delphi had the feeling of love as well as hate and a relationship with the. NET. The runtime library for Delphi has been spoiled by the RAD development and its richness and they have been enjoying it for long years. There are three significant releases and now it has become obvious that the assumptions were completely wrong. The third-party market for the development of the .NET has developed a strong and vast range of components that are professional and they're being available in the imaginable areas and paths. At the same time, the component of the Delphi is seeming to be winding down and they have support in favor of the .NET or they can be leaving the market. This was the reason the runtime library for the Delphi was introduced and it acted as a bridge to fill the gap between the Delphi development and the. NET. It has the ability to access the framework class library of the .NET along with accessing the net libraries of the third party. It can load as well as access the assemblies and the tapes from the third party and the libraries that are executable files in nature. It can also create instances and handle the exception of the. NET. The library of the CNClr allows the user to keep the process of investment in the existing as well as native Delphi code and at the same time, it performs the opening of the application for the user in the framework class library. Also at the same time, the existing code can be kept as well as maintained in the Delphi and the parts can be contributed to anything that appears to the user as a single, unified application. This library makes it possible for the users and the developers to employ new as well as emerging technologies of .NET right within the existing Delphi application frame of the user. The runtime library is known to be a collection of implementation for the function all in one big file on the floating-point from the functions that are mainly traditional and are stored separately from the rest. This big fire can be typically used as something on the same as the general order like the zip file but they don’t have any compression and it is just little files that are connected and our store together into one bigger file. Define that is archived can usually contain indexing in order to make it relatively fast as well as easy where do users and the developer and sometimes Microsoft had used the format of the library which was extended and then Linker and the user can use it in order to find the function and implementation in which the sub-files are located. Usually, the library of the runtime can realize different functions by the process of accessing the system of operation. Many programming languages are created and are built-in and they do not have any necessity to be realized by the compiler.