在使用AspNet.WebApi.Versioning库时，如果想要改变IEnumerable参数的模型绑定行为，可以通过重写DefaultQueryValueBinder类来实现。

首先，创建一个自定义的QueryValueBinder类，继承自DefaultQueryValueBinder类，并重写BindModel方法。在BindModel方法中，判断参数类型是否为IEnumerable，并进行相应的处理。

using Microsoft.AspNetCore.Mvc.ModelBinding;
using Microsoft.AspNetCore.Mvc.ModelBinding.Binders;
using Microsoft.Extensions.Logging;
using System;
using System.Globalization;
using System.Linq;
using System.Threading.Tasks;

namespace YourNamespace
{
    public class CustomQueryValueBinder : DefaultQueryValueBinder
    {
        public CustomQueryValueBinder(IModelMetadataProvider metadataProvider, ILoggerFactory loggerFactory)
            : base(metadataProvider, loggerFactory)
        {
        }

        public override Task BindModelAsync(ModelBindingContext bindingContext)
        {
            if (bindingContext == null)
            {
                throw new ArgumentNullException(nameof(bindingContext));
            }

            var modelType = bindingContext.ModelType;
            if (typeof(IEnumerable).IsAssignableFrom(modelType))
            {
                // 处理IEnumerable类型参数的绑定行为
                var valueProviderResult = bindingContext.ValueProvider.GetValue(bindingContext.ModelName);
                if (valueProviderResult != ValueProviderResult.None)
                {
                    var values = valueProviderResult.Values.ToArray();
                    var elementType = modelType.GetGenericArguments().FirstOrDefault();
                    var elementBinder = GetBinder(elementType);

                    var bindingTasks = new Task[values.Length];

                    for (var i = 0; i < values.Length; i++)
                    {
                        var modelMetadata = bindingContext.ModelMetadata.GetMetadataForType(elementType);
                        var modelBindingContext = DefaultModelBindingContext.CreateBindingContext(
                            bindingContext.ActionContext,
                            bindingContext.ValueProvider,
                            modelMetadata,
                            bindingInfo: null,
                            bindingContext.ModelName);

                        modelBindingContext.Model = elementType.IsValueType ? Activator.CreateInstance(elementType) : null;
                        modelBindingContext.ModelType = elementType;

                        bindingTasks[i] = elementBinder.BindModelAsync(modelBindingContext);
                    }

                    return Task.WhenAll(bindingTasks).ContinueWith(t =>
                    {
                        var result = (Array)Array.CreateInstance(elementType, values.Length);

                        for (var i = 0; i < values.Length; i++)
                        {
                            result.SetValue(bindingTasks[i].Result.Model, i);
                        }

                        return ModelBindingResult.Success(result);
                    });
                }
            }

            return base.BindModelAsync(bindingContext);
        }
    }
}

然后，在Startup.cs文件中的ConfigureServices方法中，使用AddMvcOptions扩展方法，并注册自定义的QueryValueBinder类。

using YourNamespace;

public void ConfigureServices(IServiceCollection services)
{
    services.AddMvc(options =>
    {
        options.ModelBinderProviders.Insert(0, new QueryStringValueProviderFactory());
        options.ModelBinderProviders.Insert(0, new FormValueProviderFactory());
        options.ModelBinderProviders.Insert(0, new BodyModelBinderProvider());

        var binderToFind = options.ModelBinderProviders.FirstOrDefault(x => x.GetType() == typeof(QueryStringValueProviderFactory));
        if (binderToFind != null)
        {
            options.ModelBinderProviders.Remove(binderToFind);
        }

        options.ModelBinderProviders.Insert(0, new CustomQueryValueBinderProvider());
    });

    //其他配置
}

最后，创建一个CustomQueryValueBinderProvider类，实现IModelBinderProvider接口，并返回自定义的QueryValueBinder类的实例。

using Microsoft.AspNetCore.Mvc.ModelBinding;

namespace YourNamespace
{
    public class CustomQueryValueBinderProvider : IModelBinderProvider
    {
        public IModelBinder GetBinder(ModelBinderProviderContext context)
        {
            if (context == null)
            {
                throw new ArgumentNullException(nameof(context));
            }

            if (context.Metadata.IsCollectionType)
            {
                return new CustomQueryValueBinder(context.Metadata.ModelType);
            }

            return null;
        }
    }
}

通过以上配置，AspNet.WebApi.Versioning库将使用自定义的QueryValueBinder类来处理IEnumerable参数的模型绑定行为。