请用C#写1到100随机排列

using System;
using System.Collections.Generic;
using System.Text;

namespace test
{
class test4
{
static int[] a=new int [101];
public static void main()
{
try
{
r1_100();
//r_100();
}
catch
{
Console.WriteLine("any question please contact me :weiliming111@tom.com");
}
}
public static void r_100()
{
int count = 0;
int count1 = 0;
for (int i = 0; i < 100; i++)
a[i] = i + 1;
trya:
Random b = new Random();
count1++;
int c = b.Next(1, 100);
for (int i = 0; i < 100; i++)
{
if (a[i] == c)