C#函数参数传送之out与ref的应用

下面我总结下我对out和ref引用参数的看法:
              1.out和ref引用参数的相同点:都是通过引用传递参数给函数;
              2.out和ref引用参数的不同点是:用ref引用传递参数,该参数必须经过初始化,并且不能在调用它的函数中初始化,以下例子是错误的：
                              namespace refConsoleApp
                                 {
                                      class MyRefClass
                                         {
                                                static void MyRefMethod(ref int i)
                                                   {
                                                                 int i=20;
                                                   }
                                                  static void main(string[] args)
                                                  {
                                                          int value;                  //not initialized the value;
                                                          MyRefMethod(ref value);
                                                          Console.WriteLine("The value is {0}",value);
                                                  }
                             }
                               }
                 3.使用out引用多个参数来返回多个值,这允许方法任意地返回需要的值，以下例子：
namespace multi_outConsoleApp
{
    class MyMultipleoutClass
    {
        static void MyMultipleMethod(out int i, out string str1, out string str2)
        {
            i = 20;
            str1 = "I was born";
            str2 = "zhaoqing";

        }
        static void Main(string[] args)
        {
            int value;
            string s1, s2;
            MyMultipleMethod(out value,out  s1,out  s2);
            Console.WriteLine("The integer value is {0} The first string value is {1} The second string value is {2}", value, s1, s2);

        }
    }
}

显示的结果为：
The integer value is 20
The first string value is I was born
The second string value is zhaoqing
      4.  如果一个方法使用ref引用参数,另一个方法使用out引用参数,则这两个相同方法名的函数不能重载,否则出现编译错误,以下例子出现: " cannot define overloaded  methods that differ only on ref and out "
namespace overloadofConsoleApp
{
    class overloadofclass
    {
        static void MyMethod(ref int i)
        {
            i = 20;
        }
        static void MyMethod(out int i)
        {
          i = 40;
        }
        static void Main(string[] args)
        {
            int refvalue=0;
            MyMethod(ref refvalue);
            Console.WriteLine("The value is {0}", refvalue);
  &nbs

补充：软件开发 , C# ,