Василий Банников

public class MyTestAttribute : Attribute
    {
        public MyEnum[] Roles { get; set; }

        public MyTestAttribute(params MyEnum[] roles)
        {
            Roles = roles;
        }
    }

[MyTest(MyEnum.One, MyEnum.Three, MyEnum.Two, MyEnum.Two)]
public void SomeMethod() { }

foreach (var item in Enumerable.Range(0, 128))
{
  Console.WriteLine(item);
}

IEnumerator<int> enumerator = Enumerable.Range(0, 128).GetEnumerator();
try
 {
   while (enumerator.MoveNext())
   {
     int item = enumerator.Current;
     Console.WriteLine(item);
   }
 }
finally
 {
  if (enumerator != null)
  {
   enumerator.Dispose();
  }
}

var nums = new[] { 100, 3, 102, 7, 1, 9, 12 };
 var max = default(int?);
 var min = default(int?);
 var avg = 0.0;
 var avgCount = 0;
 foreach (var number in nums)
 {
     if (min == null)
     {
         min = number;
     }
     else if (max == null)
     {
         max = number;
         if (max < min)
         {
             max = min;
             min = number;
         }
     }
     else if (number < min)
     {
         avg = ((avg * avgCount) + min.Value) / ++avgCount;
         min = number;
     }
     else if (number > max)
     {
         avg = ((avg * avgCount) + max.Value) / ++avgCount;
         max = number;
     }
     else
     {
         avg = ((avg * avgCount) + number) / ++avgCount;
     }
 }