# Solution Structure

Create a modular .NET solution with proper layer separation.

## Create Solution

```bash
mkdir OrderManagement
cd OrderManagement

# Create solution file
dotnet new sln -n OrderManagement

# Create projects
dotnet new webapi -n OrderManagement.Api
dotnet new classlib -n OrderManagement.CQRS
dotnet new classlib -n OrderManagement.Domain
dotnet new classlib -n OrderManagement.Infrastructure
dotnet new xunit -n OrderManagement.Tests

# Add to solution
dotnet sln add OrderManagement.Api
dotnet sln add OrderManagement.CQRS
dotnet sln add OrderManagement.Domain
dotnet sln add OrderManagement.Infrastructure
dotnet sln add OrderManagement.Tests
```

## Project Dependencies

```bash
# Api depends on CQRS and Infrastructure
cd OrderManagement.Api
dotnet add reference ../OrderManagement.CQRS
dotnet add reference ../OrderManagement.Infrastructure

# CQRS depends on Domain
cd ../OrderManagement.CQRS
dotnet add reference ../OrderManagement.Domain

# Infrastructure depends on Domain
cd ../OrderManagement.Infrastructure
dotnet add reference ../OrderManagement.Domain

# Tests depend on all
cd ../OrderManagement.Tests
dotnet add reference ../OrderManagement.Api
dotnet add reference ../OrderManagement.CQRS
dotnet add reference ../OrderManagement.Domain
dotnet add reference ../OrderManagement.Infrastructure
```

## Add NuGet Packages

```bash
# Api
cd OrderManagement.Api
dotnet add package Svrnty.CQRS.MinimalApi
dotnet add package Svrnty.CQRS.Grpc

# CQRS
cd ../OrderManagement.CQRS
dotnet add package Svrnty.CQRS
dotnet add package Svrnty.CQRS.FluentValidation
dotnet add package FluentValidation

# Infrastructure
cd ../OrderManagement.Infrastructure
dotnet add package Microsoft.EntityFrameworkCore
dotnet add package Npgsql.EntityFrameworkCore.PostgreSQL
```

## Next Steps

Continue to [Domain Layer](02-domain-layer.md)