‫یکدست کردن «ی» و «ک» در ASP.NET Core با پیاده‌سازی یک Model Binder سفارشی

public class CustomStringModelBinderProvider : IModelBinderProvider
{    public IModelBinder GetBinder(ModelBinderProviderContext context)    {        if (context == null)        {            throw new ArgumentNullException(nameof(context));        }        if (context.Metadata.IsComplexType)        {            return null;        }        var fallbackBinder = new SimpleTypeModelBinder(context.Metadata.ModelType);        if (context.Metadata.ModelType == typeof(string))        {            return new CustomStringModelBinder(fallbackBinder);        }        return fallbackBinder;    }
}

public class CustomStringModelBinder : IModelBinder
{    private readonly IModelBinder _fallbackBinder;    public CustomStringModelBinder(IModelBinder fallbackBinder)    {        if (fallbackBinder == null)        {            throw new ArgumentNullException(nameof(fallbackBinder));        }        _fallbackBinder = fallbackBinder;    }    public Task BindModelAsync(ModelBindingContext bindingContext)    {        if (bindingContext == null)        {            throw new ArgumentNullException(nameof(bindingContext));        }        var valueProviderResult = bindingContext.ValueProvider.GetValue(bindingContext.ModelName);        if (valueProviderResult != ValueProviderResult.None)        {            bindingContext.ModelState.SetModelValue(bindingContext.ModelName, valueProviderResult);            var valueAsString = valueProviderResult.FirstValue;            if (string.IsNullOrWhiteSpace(valueAsString))            {                return _fallbackBinder.BindModelAsync(bindingContext);            }            var model = valueAsString.Replace((char)1610, (char)1740).Replace((char)1603, (char)1705);            bindingContext.Result = ModelBindingResult.Success(model);            return Task.CompletedTask;        }        return _fallbackBinder.BindModelAsync(bindingContext);    }
}

public static class CustomStringModelBinderExtensions
{    public static MvcOptions UseCustomStringModelBinder(this MvcOptions options)    {        if (options == null)        {            throw new ArgumentNullException(nameof(options));        }        var simpleTypeModelBinder = options.ModelBinderProviders.FirstOrDefault(x => x.GetType() == typeof(SimpleTypeModelBinderProvider));        if (simpleTypeModelBinder == null)        {            return options;        }        var simpleTypeModelBinderIndex = options.ModelBinderProviders.IndexOf(simpleTypeModelBinder);        options.ModelBinderProviders.Insert(simpleTypeModelBinderIndex, new CustomStringModelBinderProvider());        return options;    }
}

public void ConfigureServices(IServiceCollection services)
{    services.AddMvc(options =>    {        options.UseCustomStringModelBinder();     });