怎样可以删除字符串中重复的字符！！！（vb.net）

[山海996]

譬如：输入为--a,d,f,s,f,a
输出则变为---d,s
多谢！

[tfrtfr]

简单的算法题嘛，给你一个，算法够不够好，就不管了。
static void Main(string[] args)
{
string input = "a,d,f,s,f,a";
string[] ss= input.Split(new char[] { ',' });
string ouput="";
Dictionary<string,int> list = new Dictionary<string,int>();
foreach (string s in ss)
{
if (list.ContainsKey(s))
list[s]++;
else
list[s] = 1;
}
foreach (KeyValuePair<string,int> l in list)
{
if (l.Value == 1)
ouput += l.Key + ",";
}
ouput = ouput.TrimEnd(new char[] {',' });
Console.WriteLine(ouput);
}

[山海996]

多谢关注，上面的问题已经解决了...
贴出来共享，THS
Dim str1 As String = "a;d;f;s;f;a"
Dim strs() = str1.Split(";")
Dim str2 As String

For i = 0 To UBound(strs)
For j = 0 To i - 1
If strs(i) = strs(j) Then
strs(i) = ""
strs(j) = ""
End If
Next
Next
For i = 0 To UBound(strs)
If strs(i) <> "" Then
str2 = str2 + " " + strs(i)
End If
Next
str2 = str2.Replace(" ", ";")