float[] col1 = new float[8];
float[] col2 ={1,2,3,4};
col2.CopyTo(col1, 0);
col2.CopyTo(col1, 4);
Array.Sort(col1); //得到的是 1,1,2,2,3,3,4,4
System.Random rnd = new System.Random();
var col3 = col1.OrderBy(r => rnd.Next()); //得到的是随机排序
foreach (var f in col1)
{
Console.WriteLine(f);
}