I'll implement the requested PHP/.NET solution for consuming the JSONPlaceholder API and creating a CRUD application. Let's build this with PHP and MySQL since those are common technologies for this type of task.

First, let's create the database structure and then implement the PHP code for all the required functionality.

Implementation Instructions

To set up and run this application:

1. Set up the database:

   • Create a MySQL database using the create_database.sql script
   • Update the database connection details in db_config.php if needed

2. Import the files to your web server:

   • Place all PHP files in your web server directory (e.g., htdocs for XAMPP)

3. Import data from the API:

   • Navigate to fetch_api_data.php in your browser to import the data from JSONPlaceholder API
   • This only needs to be done once to populate the database

4. Use the application:

   • Open index.php in your browser to access the main application
   • You can now view, add, edit, and delete users

Features Implemented

1. Database Structure:

   • Created a MySQL table with an auto-increment primary key
   • Fields for name, email, phone, company, street, latitude, and longitude

2. API Data Import:

   • Function to fetch data from JSONPlaceholder API
   • Transforms and stores the data in the MySQL database

3. CRUD Operations:

   • Create: Add new users via the form
   • Read: View all users in a table and view individual user details
   • Update: Edit existing user information
   • Delete: Remove users from the database

4. User Interface:

   • Responsive design using Bootstrap
   • Form for adding/editing users
   • Table to display all users
   • Detailed view for individual users

This implementation satisfies all the requirements specified in the task, providing a complete solution for managing user data fetched from the JSONPlaceholder API.