四、C#方法和参数

 1   class Program
 2     {
 3         static void Main(string[] args)
 4         {
 5             int x = 0;
 6             Program p = new Program();
 7             p.ChangeValue(x, p);
 8             Console.WriteLine("x=" + x + ",p.count=" + p.count);
 9             Console.ReadLine();
10  
11  
12         }
13         public void ChangeValue(int pValue,Program p)
14         {
15             int temp = pValue;
16             pValue = 10;
17             p.number = 10;
18             p.count = 10;
19             p = new Program();
20             p.count = 20;
21  
22         }
23         public int number = 0;
24         public int count = 0;
25     }

 1 class Program
 2     {
 3         static void Main(string[] args)
 4         {
 5             int x = 0;
 6             Program p = new Program();
 7             p.ChangeValue(ref x, ref p);
 8             Console.WriteLine("x=" + x + ",p.count=" + p.count);
 9             Console.ReadLine();
10  
11  
12         }
13         public void ChangeValue(ref int pValue,ref Program p)
14         {
15             int temp = pValue;
16             pValue = 10;
17             p.number = 10;
18             p.count = 10;
19             p = new Program();
20             p.count = 20;
21  
22         }
23         public int number = 0;
24         public int count = 0;
25     }

 1 class Program
 2     {
 3         static void Main(string[] args)
 4         {
 5             string fullName;
 6             fullName = Combine(Directory.GetCurrentDirectory(), "bin", "config", "index.html");
 7             Console.WriteLine(fullName);
 8             fullName = Combine(new string[] { Directory.GetCurrentDirectory(), "bin", "config", "index.html" });
 9             Console.WriteLine(fullName);
10             Console.ReadLine();
11         }
12         static string Combine(params string[] paths)
13         {
14             string result = string.Empty;
15             foreach (string path in paths)
16             {
17                 result = System.IO.Path.Combine(result, path);
18             }
19             return result;
20         }
21       
22     }

 1   class Program
 2     {
 3         static void Main(string[] args)
 4         {
 5             string firstName = "aaaaa", middleName = "bbbbbbbbb", lastName = "cccccccc";
 6             string fullName;
 7             fullName = Combine(firstName);
 8             Console.WriteLine(fullName);
 9  
10             fullName = Combine(pfirstName: firstName,plastName:lastName);
11             Console.WriteLine(fullName);
12  
13             fullName = Combine(pfirstName: firstName, pmiddleName: middleName);
14             Console.WriteLine(fullName);
15  
16             Console.ReadLine();
17  
18  
19         }
20         static string Combine(string pfirstName, string pmiddleName = ".", string plastName = "")
21         {
22             string result = pfirstName + pmiddleName + plastName;
23  
24             return result;
25         }
26       
27     }