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// 定义数组
int[] a = { 20, 9, 11, 40, 43, 3, 5, 11, 13, 3, 7, 25, 2, 9, 18, 16 };
// 真正的代码就 1 行:
var result = (from n in a orderby n select n).Distinct().Take(3).ToList();
// 输出
foreach (int i in result)
Console.WriteLine(i);
Dim array1() As Integer = {21, 3, 34, 5, 7, 5, 14, 17, 11, 13}
Array.Sort(array1)
For i = 0 To array1.Length - 2
If array1(i) = array1(i + 1) Then
For j = i + 1 To array1.Length - 2
array1(j) = array1(j + 1)
Next
End If
Next
TextBox1.Text = array1(0)
TextBox2.Text = array1(1)
TextBox3.Text = array1(2)