not able to create db

Hi SHIVRAJ GOPCHADE,

The error you are experiencing typically arises from issues with the configuration file or the dependency injection setup for your DbContext. Here are a few steps to troubleshoot and resolve the issue:

1. Check appsettings.json: Ensure that the appsettings.json file exists at the specified path and is correctly formatted. A missing or malformed file can lead to configuration loading failures.

2. Configure Services: In your Startup.cs, ensure that you have properly configured the DbContext in the ConfigureServices method. For example:

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

4. Connection String: Verify that your connection string in appsettings.json is correct and points to a valid database server.

5. {
       "ConnectionStrings": {
           "DefaultConnection": "Server=your_server;Database=your_db;User Id=your_user;Password=your_password;"
       }
   }
   

6. Migrations: If you are using Entity Framework Core, ensure that you have applied any pending migrations using the command:

7. dotnet ef database update
   

By following these steps, you should be able to resolve the issue and successfully create your database. If the problem persists, consider checking for additional details in the error message or logs for further insights.

Please check the package reference and version, dependency injections and connection string details 

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

Next -

public class SchoolContext : DbContext
{
public SchoolContext(DbContextOptions options) : base(options) { }
}