Resolving Cross-Origin Resource Sharing Disabled in .Net

To resolve CORS (Cross-Origin Resource Sharing) disabled in .NET, you need to enable CORS in your .NET application. CORS is a mechanism that allows web browsers to make cross-origin requests to a different domain.

Here's how you can enable CORS in a .NET application:

1. Install the Microsoft.AspNetCore.Cors NuGet package: Open the NuGet Package Manager console in Visual Studio and run the following command:

   
   Install-Package Microsoft.AspNetCore.Cors
   

2. Open the Startup.cs file in your .NET project.

3. In the ConfigureServices method, add the CORS service configuration using the AddCors method. This enables CORS for your application. You can specify various options within the AddCors method to configure CORS behavior. Here's a basic example that allows all origins, methods, and headers:

   
   public void ConfigureServices(IServiceCollection services)
   {
       services.AddCors(options =>
       {
           options.AddDefaultPolicy(builder =>
           {
               builder.AllowAnyOrigin()
                      .AllowAnyMethod()
                      .AllowAnyHeader();
           });
       });
   
       // Other service configurations...
   }
   

   Note: You can customize the CORS policy to restrict origins, methods, headers, and more according to your requirements. Refer to the documentation for more advanced configuration options.

4. In the Configure method, add the CORS middleware to the request pipeline. This ensures that CORS-related headers are properly processed:

   
   public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
   {
       // Other app configurations...
   
       app.UseCors(); // Add this line to enable CORS
   
       // Other middleware configurations...
   }
   

5. Save the changes to the Startup.cs file.

By following these steps, you have enabled CORS in your .NET application. Now the application should respond to cross-origin requests based on the CORS policy you defined.