How to move code in startup cs in asp net core 3 1 to asp net core 6

Introduction

ASP.NET is a popular programming language used for web applications. With the of ASP.NET Core 6, there have been some changes in the code structure, including the .cs file. In this article, we will discuss how to move code from the startup.cs file in ASP.NET Core 3.1 to ASP.NET Core 6, with examples.

Understanding the Changes

Before we dive into the code examples, let's understand the changes that have been made in ASP.NET Core 6. In previous versions, the startup.cs file was responsible for configuring various services and middleware for the application. However, in ASP.NET Core 6, the startup.cs file has been split into multiple files for better organization and maintainability.

Moving Code from Startup.cs in ASP.NET Core 3.1 to ASP.NET Core 6

To move code from the startup.cs file in ASP.NET Core 3.1 to ASP.NET Core 6, follow these steps:

Step 1: a New File

Create a new file in your ASP.NET Core 6 to hold the code that you want to move from the startup.cs file. You can name this file based on the functionality or purpose of the code.

Step 2: Move the Code

Copy the code that you want to move from the startup.cs file and paste it into the newly created file. Make sure to maintain the same structure and order of the code.

Step 3: Remove the Code from Startup.cs

Once you have moved the code to the new file, remove it from the startup.cs file. This will ensure that the code is not duplicated and is only present in the new file.

Step 4: the New File

In ASP.NET Core 6, you need to register the new file in the startup.cs file to ensure that it is included in the application's configuration. To do this, open the startup.cs file and locate the ConfigureServices method. Inside this method, add the following code:


services.AddNewFile();

“AddNewFile” with the appropriate method or extension method that registers the new file.

Let's consider an example where we want to move the code responsible for configuring the database connection from the startup.cs file to a separate file named DatabaseConfig.cs.

In the startup.cs file:


public void ConfigureServices(IServiceCollection services)
{
    // Existing code
    
    services.AddDbContext(options =>
        options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection")));
    
    // Existing code
}

In the newly created DatabaseConfig.cs file:


public static class DatabaseConfig
{
    public static void AddDatabaseConfig(this IServiceCollection services, IConfiguration configuration)
    {
        services.AddDbContext(options =>
            options.UseSqlServer(configuration.GetConnectionString("DefaultConnection")));
    }
}

In the startup.cs file:


public void ConfigureServices(IServiceCollection services)
{
    // Existing code
    
    services.AddDatabaseConfig(Configuration);
    
    // Existing code
}

By following these steps, you can successfully move code from the startup.cs file in ASP.NET Core 3.1 to ASP.NET Core 6, ensuring better organization and maintainability of your code.

Conclusion

In this article, we discussed how to move code from the startup.cs file in ASP.NET Core 3.1 to ASP.NET Core 6. By splitting the startup.cs file into multiple files, ASP.NET Core 6 provides a more organized and maintainable code structure. We provided step-by-step instructions with an example to help you understand the process. By following these guidelines, you can easily migrate your code and take advantage of the new and improvements in ASP.NET Core 6.

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