1. Sign up and log in to Supabase.
2. Click on "New Project".
3. Fill in the required details like project name, password, and region.
4. Once the project is created, note down the API URL and Anon key from the project settings.

1. Open a terminal and create a new ASP.NET Core project using the command:
   ```shell
   dotnet new webapi -n SupabaseAspNet
   ```
2. Navigate to the newly created project directory:
   ```shell
   cd SupabaseAspNet
   ```

1. Install the Supabase .NET SDK using NuGet:
   ```shell
   dotnet add package Supabase
   ```
2. Open Startup.cs or Program.cs (depending on your ASP.NET Core version) to configure the Supabase client.

1. Add configuration settings in appsettings.json:
   ```json
   {
   "Supabase": {
   "Url": "YOUR_SUPABASE_URL",
   "AnonKey": "YOUR_SUPABASE_ANON_KEY"
   }
   }
   ```
2. In Startup.cs or Program.cs, read the settings and initialize the Supabase client:
   ```csharp
   public class Startup
   {
   public IConfiguration Configuration { get; }
   
   public Startup(IConfiguration configuration)
   {
   Configuration = configuration;
   }
   
   public void ConfigureServices(IServiceCollection services)
   {
   var supabaseUrl = Configuration["Supabase:Url"];
   var supabaseAnonKey = Configuration["Supabase:AnonKey"];
   
   var supabase = new Supabase.Client(supabaseUrl, supabaseAnonKey);
   
   services.AddSingleton(supabase);
   services.AddControllers();
   }
   
   public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
   {
   if (env.IsDevelopment())
   {
   app.UseDeveloperExceptionPage();
   }
   
   app.UseRouting();
   app.UseEndpoints(endpoints =>
   {
   endpoints.MapControllers();
   });
   }
   }
   ```

1. Create a new controller, for example SupabaseController.cs:
   ```csharp
   using Microsoft.AspNetCore.Mvc;
   using Supabase;

   [ApiController]
   [Route("[controller]")]
   public class SupabaseController : ControllerBase
   {
   private readonly Client _supabase;
   
   public SupabaseController(Client supabase)
   {
   _supabase = supabase;
   }
   
   [HttpGet("data")]
   public async Task GetData()
   {
   var data = await _supabase.From("your_table").Get();
   return Ok(data.Models);
   }
   }
   ```

1. Execute the following command to run your application:
   ```shell
   dotnet run
   ```
2. Access the endpoint in your browser or via Postman by navigating to https://localhost:[port]/supabase/data.

Remember to replace "your_table" with the actual table name in your Supabase database for the data fetching to work properly.