C# HELP!!

Linked List

• This will be the main form.
• There should be a listbox used to display results a textbox and a label for the textbox
• There should be the following functioning buttons:
  • Clear clears the contents of the listbox
  • Add Item adds information from the textbox and places it in a linked list
  • Remove Item removes item that is typed in textbox if it is there, otherwise a message box should say item not found.
  • Contains shows a message box if the data entered into the textbox was found in the linked list or not.
  • Display displays results in listbox after another button in clicked.
• It will contain the following functional menu items:
  • GoTo
    • Input Output - opens modal Input Ouput form
    • Mouser - opens modal Mouser form
  • Help
    • About - opens modeless About form

Input Output

• Create a text file with 6 double numbers listed. Name the text file numbers.txt. In this form you should read this files contents into an array when the form is loaded and then display the arrays contents in a ListBox control.
• There should be a Grades button that calculates the total of the grades in the array, the average of the grades in the array, and the letter grade of the grades in the array.
• Use an if/else if construct or switch to figure the letter grades based on the following criteria: Greater than or equal to 90 A, Greater than or equal to 80 but less than 90 B, Greater than or equal to 70 but less than 80 C, Greater than or equal to 60 but less than 70 D, Less than 60 F.
• Write all information (6 grades, total of grades, average of grades and letter grade) out to a text file named grades. Make sure to label each piece of information you put into the file.

• Close button to close the form to return to the main form.