易犯的错误忘了初始化对象

错误的代码：
UpdateApplicationInfo[] uai = new UpdateApplicationInfo[3];
                    int position = 0;
                    foreach (DictionaryEntry de in ht)
                    {
                        uai[position].ApplicationGUID = de.Key.ToString();
                        uai[position].Version = de.Value.ToString();
                        position++;
                    }

正确的：
UpdateApplicationInfo[] uai = new UpdateApplicationInfo[3]; //只是分配了地址，但是没有指向正确的对象，因为还没有分配对象
                    for (int i = 0; i < 3; i++)
                    {
                        uai[i] = new UpdateApplicationInfo(); //注意分别初始化对象
                    }
                    int position = 0;
                    foreach (DictionaryEntry de in ht)
                    {
                        uai[position].ApplicationGUID = de.Key.ToString();
                        uai[position].Version = de.Value.ToString();
                        position++;
                    }