需要解釋一些代碼。

Question

什麼

public object this[string name] 

做

class ObjectWithProperties 
{ 
    Dictionary<string, object> properties = new Dictionary<string, object>(); 

    public object this[string name] 
    { 
     get 
     { 
      if (properties.ContainsKey(name)) 
      { 
       return properties[name]; 
      } 
      return null; 
     } 
     set 
     { 
      properties[name] = value; 
     } 
    } 
} 

Answer 1

你將能夠在你的字典裏，直接從您的對象使用索引（即，無屬性名稱）

參考值，在你的情況它將是

var foo = new ObjectWithProperties(); 
foo["bar"] = 1; 
foo["kwyjibo"] = "Hello world!" 

// And you can retrieve them in the same manner... 

var x = foo["bar"]; // returns 1 

MSDN指南：http://msdn.microsoft.com/en-gb/library/2549tw02.aspx

基礎教程：http://www.tutorialspoint.com/csharp/csharp_indexers.htm

編輯回答問題的評論：

這相當於做類似如下：

class ObjectWithProperties 
{ 
    public Dictionary<string, object> Properties { get; set; } 

    public ObjectWithProperties() 
    { 
     Properties = new Dictionary<string, object>(); 
    } 
} 

// instantiate in your other class/app/whatever 
var objWithProperties = new ObjectWithProperties(); 
// set 
objWithProperties.Properties["foo"] = "bar"; 
// get 
var myFooObj = objWithProperties.Properties["foo"]; // myFooObj = "bar"