I need answer in .NET only

You need to develop a .NET library assembly (DLL) for a helper method to process a linked list, implemented as the static class LinkedlistHelpers. You must provide a zip file with source code written in C#. You must also provide passing unit tests. a. Create a method that receives as input parameter the root node of a liked list and deletes the nodes with values that are repeated more than 2 times. Each node contains a character value from 'A' to 'Z'. The nodes in the list can come in any random order. You need to preserve the original order of the nodes. See the example below. Input: E B B A B After calling the method: E B E B A b. What is the time complexity and space complexity of your solution