有好多个方法实现

1. 用一个Dictionary实现。

参考代码

static List
     
       removeDuplicates(List
      
        inputList){Dictionary
       
         uniqueStore = new Dictionary
        
         ();List
         
           finalList = new List
          
           (); foreach (string currValue in inputList){if (!uniqueStore.ContainsKey(currValue)){uniqueStore.Add(currValue, 0);finalList.Add(currValue);}}return finalList;}
          
         
        
       
      
     

 

2. 用LINQ的Distinct方法。

简单的List 直接用就可以了 http://www.dotnetperls.com/remove-duplicates-list

 

如果是要Distinct一个类，要 Custom Comparer , 方法嘛。看这里：

http://msdn.microsoft.com/en-us/library/bb338049.aspx