asp.net allow cors for all
// Credit_1: https://www.infoworld.com/article/3327562/how-to-enable-cors-in-aspnet-core.html
// Credit_2: https://docs.microsoft.com/en-us/aspnet/core/security/cors?view=aspnetcore-5.0
// At class "Startup":
#region global variables
readonly string MyAllowSpecificOrigins = "_myAllowSpecificOrigins";
#endregion
// Inside "ConfigureServices" function
// From a --SINGLE SOURCE-- (in this case localhost:4200):
services.AddCors(options =>
{
options.AddPolicy(name: MyAllowSpecificOrigins,
builder => builder.WithOrigins("http://localhost:4200").AllowAnyMethod().AllowAnyHeader());
});
// From --ALL SOURCES--:
services.AddCors(options =>
{
options.AddPolicy(name: MyAllowSpecificOrigins,
builder => builder.AllowAnyOrigin());
});
// Inside "Configure" function
app.UseCors(MyAllowSpecificOrigins);