To rename a project or a specific item in Visual Studio, you can use several methods, the most common being renaming via Solution Explorer or refactoring. To rename a project or item in Solution Explorer: Select the project or item: In Solution Explorer, right-click the project or file (such as a form or class) you want to rename. Select Rename: In the context menu, choose Rename. Enter the new name: Type the desired new name and press Enter. Commit the changes: Visual Studio will ask you if you want to update all references in your project. Confirm yes to apply the change everywhere the old name was used, including namespaces. Refactoring the name (for specific elements such as variables, functions, etc.): 1. Select the element: Click on the element (variable, function, class, etc.) whose name you want to change. 2. Use the refactoring option: You can right-click on the element and select "Rename," or go to the Edit > Refactor > Rename menu. 3. Enter the new name: Type the new name and press Enter. Visual Studio will update all references. Additional considerations: Renaming the main assembly/namespace: If you want to rename the application at the assembly or namespace level, you can do so in the project properties (Project > Properties > Application) and then make sure to update any references where the old name is used. .suo Files: After renaming a solution and if you experience problems, consider closing Visual Studio, going to the project folder, and deleting the .suo (Solution User Options) files before reopening the project.