add nuget script to readme

Author: SaberToTallyTech

README.md

@@ -12,8 +12,17 @@ Also, it is new way and also a fast way to create or update a collection Postman
 
 It's easy to use. just you should install the package on your project from the below address and use sample codes for how to call and work with extensions.
 
+
+** For adding library to your project **
+
+```
+dotnet add package HttpClientToCurl 
+```
+
 [Nuget Package Address](https://www.nuget.org/packages/HttpClientToCurl/)
 
+
+
 You have **3 ways** to see script result:
 
 **1: Put it in a string variable:**