# CSharp Project Layout

A: Certainly! I'll guide you through creating namespaces and modules in a .NET 6 C# project with the given example file structure layout.

Let's start with the file structure layout:

```plaintext
- MyProject
  - Program.cs
  - Modules
    - ParseCSV.cs
    - StateDB.cs
  - DomainModels
    - UserModel.cs
    - ProductModel.cs
```

First, create a new C# console project in Visual Studio or your preferred editor.

In `Program.cs`, we'll start by creating the namespaces for `ParseCSV`, `StateDB`, and `DomainModels`. By convention, the namespace should match the folder structure.

```csharp
using MyProject.Modules;
using MyProject.DomainModels;

namespace MyProject
{
    class Program
    {
        static void Main(string[] args)
        {
            // Your program logic here
        }
    }
}
```

Now, let's create the module files.

In `ParseCSV.cs`, create the `ParseCSV` module:

```csharp
namespace MyProject.Modules
{
    public class ParseCSV
    {
        public static void Parse(string csvFilePath)
        {
            // Your logic to parse the CSV file
        }
    }
}
```

In `StateDB.cs`, create the `StateDB` module:

```csharp
namespace MyProject.Modules
{
    public class StateDB
    {
        public static void Save(string state)
        {
            // Your logic to save state to a database
        }
    }
}
```

Finally, in the `DomainModels` folder, create the model files.

In `UserModel.cs`, create the `UserModel` class:

```csharp
namespace MyProject.DomainModels
{
    public class UserModel
    {
        public string FirstName { get; set; }
        public string LastName { get; set; }
    }
}
```

In `ProductModel.cs`, create the `ProductModel` class:

```csharp
namespace MyProject.DomainModels
{
    public class ProductModel
    {
        public string Name { get; set; }
        public decimal Price { get; set; }
    }
}
```

With this setup, you can now use the modules and domain models within the `Main` method of `Program.cs`.

```csharp
using MyProject.Modules;
using MyProject.DomainModels;

namespace MyProject
{
    class Program
    {
        static void Main(string[] args)
        {
            // Example usage of modules and domain models
            ParseCSV.Parse("data.csv");
            StateDB.Save("some state");

            var user = new UserModel()
            {
                FirstName = "John",
                LastName = "Doe"
            };

            var product = new ProductModel()
            {
                Name = "Example Product",
                Price = 9.99m
            };
        }
    }
}
```

That's it! You now have a project structure with namespaces and modules for `ParseCSV` and `StateDB`, as well as domain models for `UserModel` and `ProductModel`.
