SQL gets Double with "Comma" tab instead of "Dot"

Question

I am developing an ASP.NET application where I need to take a DOBULE typed by the user and pass to the bank.

However there is a divergence of information, the DOUBLE of my bank receives separator with Comma "123,456" and the application passes with Point "123,456", but when the bank receives "." it ignores, so it turns a value "123.456" into "123456"

How can I fix it?

MODEL:

public class Friend
{
    public int Id { get; set; }

    public string Nome { get; set; }
    public string Rua { get; set; }
    public string Cidade { get; set; }
    public string Estado { get; set; }
    public string Pais { get; set; }
    [Required]
    public double Latitude { get; set; }
    [Required]
    public double Longitude { get; set; }

}

Migration:

migrationBuilder.CreateTable(
            name: "Friend",
            columns: table => new
            {
                Id = table.Column<int>(nullable: false)
                    .Annotation("SqlServer:Identity", "1, 1"),
                Nome = table.Column<string>(nullable: true),
                Rua = table.Column<string>(nullable: true),
                Cidade = table.Column<string>(nullable: true),
                Estado = table.Column<string>(nullable: true),
                Pais = table.Column<string>(nullable: true),
                Latitude = table.Column<double>(nullable: false),
                Longitude = table.Column<double>(nullable: false)
            },
            constraints: table =>
            {
                table.PrimaryKey("PK_Friend", x => x.Id);
            });

Prints:

Answer 1

In that case you have some options:

1. You can change your application by placing a Mask in the Text Field just accepting the '.'
2. You can in the controller of your application add a parse to replace ',' with '.' in your ex variable:

double.Parse("3,5", CultureInfo.InvariantCulture)