need it in C#

Write an application that can be used to count the frequency of char- acters in a paragraph. Allow the user to input several sentences using a graphical user interface. Display the count for nonzero characters. Use an array as part of your solution. Include appropriate exception- handling techniques so that if the program attempts to access an ele- ment outside of the bounds of the array, the exception is handled. can you please upload the program? Visual studio, I'd like to run it. Thank you