C# - Create a class object called Employee which included six private variables: First Name Last Name ID number Initial Salary Start Year Current Salary Also included methods: Constructors Properties (curSalary is a read-only). CalcCurSalary():Calculate the current salary based on a 5% yearly increment from the startYear. Create an EmployeeDemo class with the main function. In the main function, the program prompts user to enter the current year. Then, the program reads three company employees information from the EmployeeInfo.txt file and save the data into three objects. After saving the data, the program prompts user to enter the range of current salary that you want to see and display the employees information whose current salary is in the range.