Updating the resource files programatically

UpdateResx.cs

using System.Resources;

var resxFilePath = @".\XyzResources.fr.resx";
var resourceKey = "greetingText";
var resourceString = "Bonjour";

if (File.Exists(resxFilePath)) 
{
    using (var resourceWriter = new ResXResourceWriter(resxFilePath)) 
    {
        resourceWriter.AddResource(resourceKey, resourceString);
        resourceWriter.Generate();
        resourceWriter.Close();
    }
}