PRivatevoidbutton1_Click(objectsender, EventArgs e)
{int[] numbers =newint[7] {0,1,2,3,4,5,6};varresult0 =fromnuminnumberswhere(num %2==0)selectnum;foreach(intninresult0)
{
listBox1.Items.Add(n);
}
}privatevoidbutton2_Click(objectsender, EventArgs e)
{
listBox1.Items.Clear();int[] numbers =newint[7] {2,3,2,4,3,5,5};varresult1 =fromnuminnumberswherenum >3orderbynum descendingselectnum;foreach(intninresult1)
{
listBox1.Items.Add(n);
}
}privatevoidbutton3_Click(objectsender, EventArgs e)
{
listBox1.Items.Clear();int[] numbers =newint[7] {2,3,2,4,3,5,5};varresult2 =fromnuminnumberswherenum >3orderbynum ascendingselectstring.Format("当前值为{0}",num) ;foreach(stringninresult2)
{
listBox1.Items.Add(n);
}
}privatevoidbutton4_Click(objectsender, EventArgs e)
{
listBox1.Items.Clear();int[] numbers =newint[7] {2,3,2,4,3,5,5};intresult3 = (fromnuminnumberswherenum >3selectnum).Count();
button4.Text+="--"+result3.ToString();
}