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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;

namespace Tango.Logging
{
    /// <summary>
    /// Contains <see cref="String"/> extension methods.
    /// </summary>
    public static class StringExtensions
    {
        /// <summary>
        /// Converts the object to string. If the object is null, will return null.
        /// </summary>
        /// <param name="obj">The object.</param>
        /// <returns></returns>
        public static String ToStringSafe(this object obj)
        {
            return obj != null ? obj.ToString() : String.Empty;
        }
    }
}
an> ConfigurationViewModel { public override void OnApplicationReady() { if (CurrentUser.HasPermission(Tango.BL.Enumerations.Permissions.FSE_RunConfigurationModule)) { InvokeUI(() => { NavigationManager.MenuItems.Add(new NavigationMenuItem(() => { NavigationManager.NavigateTo<ConfigurationModule>(); }) { Name = "Configuration", Index = 8, Description = "Access to the organization machines configuration and settings", Image = ResourceHelper.GetImageFromResources("Images/configuration.png"), }); }); } } public async override Task<bool> OnApplicationLogout() { while (ModularNavigationManager.CurrentView != ConfigurationView.SelectionView) { if (!await ModularNavigationManager.NavigateBack()) { return false; } } return await base.OnApplicationLogout(); } public async override Task<bool> OnNavigateBackRequest() { if (ModularNavigationManager.CurrentView == ConfigurationView.SelectionView) { return await base.OnNavigateBackRequest(); } else { await ModularNavigationManager.NavigateBack(); return false; } } } }