Create resource (.resx) file programmatically using C# and VB.Net in ASP.Net

Hi VinayG,

Check this example. Now please take its reference and correct your code.

For accessing ResXResourceWriter you need to add System.Windows.Form library in your project form the .NET tab.

Code

C#

protected void Page_Load(object sender, EventArgs e)
{
    using (System.IO.FileStream fs = new System.IO.FileStream(Server.MapPath("~/TestResource.resx"), System.IO.FileMode.Create))
    {
        using (System.Resources.ResXResourceWriter resx = new System.Resources.ResXResourceWriter(fs))
        {
            resx.AddResource("Key1", "Value1");
            resx.AddResource("Key2", "Value2");
            resx.AddResource("Key3", "Value3");
        }
    }
}

VB.Net

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
    Using fs As IO.FileStream = New IO.FileStream(Server.MapPath("~/TestResource.resx"), IO.FileMode.Create)
        Using resx As Resources.ResXResourceWriter = New Resources.ResXResourceWriter(fs)
            resx.AddResource("Key1", "Value1")
            resx.AddResource("Key2", "Value2")
            resx.AddResource("Key3", "Value3")
        End Using
    End Using
End Sub

Screenshot

For more details refer the below link.

Working with .resx Files Programmatically

Refer

https://docs.microsoft.com/en-us/dotnet/framework/resources/working-with-resx-files-programmatically