I'm having trouble with this programming assignment. I can't seem to get it working properly.

 

_______________________________________________________________________CSC253ADVANCED C# PROGRAMMING_______________________________________________________________________LAB 07STRINGS AND CHARACTERSOBJECTIVESIn this lab assignment, students will learn:- To create immutable character-string objects of class String- To use string methods to manipulate strings- To create mutable character-string objects of class StringBuilder- To manipulate mutable character-string objects of class StringBuilderGOALSIn this lab assignment, students will demonstrate the abilities to:- Create immutable character-string objects of class String- Use string methods to manipulate strings- Create mutable character-string objects of class StringBuilder- Manipulate mutable character-string objects of class StringBuilderDESCRIPTIONPROGRAM1This program is about StringBuilder.Create a C# Windows application thathas the following GUI:

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• 1496734472-cplab007.docx