我已经在我的c项目中实现了redis缓存。我只想知道我怎么能让我的工作负担过重 Get<T> 也接受超时值。我觉得这是向我的redis缓存提供程序添加过期信息的最好方法。下面是我的代码：

public async Task<T> GetAsync<T>(string key)
{
    return (await _cacheClient.Db0.GetAsync<T>(key).ConfigureAwait(false));
}
/// <summary>
/// Fetch item from cache
/// </summary>
/// <typeparam name="T">Return Type</typeparam>
/// <param name="key">Key identifier in cache</param>
/// <returns>Cached item</returns>
public T Get<T>(string key)
{
    return AsyncHelper.RunSync(() => _cacheClient.Db0.GetAsync<T>(key));

}

/// <summary>
/// Fetch from cache, else execute operation and cache
/// </summary>
/// <typeparam name="T">Return Type</typeparam>
/// <param name="key">Key identifier in cache</param>
/// <param name="method">Method to execute</param>
/// <param name="args">Method args</param>
/// <returns></returns>
public async Task<T> GetAsync<T>(string key, Delegate method, params object[] args)
{
    T result = default(T);

    try
    {
        if (await _cacheClient.Db0.ExistsAsync(key))
        {
            return await _cacheClient.Db0.GetAsync<T>(key);
        }
        else
        {
            result = ExecMethod<T>(method, args);
            await _cacheClient.Db0.AddAsync(key, result);
        }
    }
    catch (Exception ex)
    {
        _logHandler.LogError($"Error fetching cache for key:{key}", ex);
        result = ExecMethod<T>(method, args);
    }

    return result;
}
/// <summary>
/// Fetch from cache, else execute operation and cache
/// </summary>
/// <typeparam name="T">Return Type</typeparam>
/// <param name="key">Key identifier in cache</param>
/// <param name="method">Method to execute</param>
/// <param name="args">Method args</param>
/// <returns></returns>
public T Get<T>(string key, Delegate method, params object[] args)
{
    T result = default(T);

    try
    {

        if (AsyncHelper.RunSync(() => _cacheClient.Db0.ExistsAsync(key)))
        {
            result = AsyncHelper.RunSync(() => _cacheClient.Db0.GetAsync<T>(key));
        }
        else
        {
            result = ExecMethod<T>(method, args);
            var added = AsyncHelper.RunSync(() => _cacheClient.Db0.AddAsync(key, result));
        }
    }
    catch (Exception ex)
    {
        _logHandler.LogError($"Error fetching cache for key:{key}", ex);
        result = ExecMethod<T>(method, args);
    }

    return result;
}