using System;

public class Program

{

    class SomeClass {

        public Int32 SomeProperty { get; set; }

​

    }

    public static void Main()

    {

        SomeClass[] arr = new [] {

            new SomeClass { SomeProperty = 99 },

            new SomeClass { SomeProperty = 98 },

            new SomeClass { SomeProperty = 92 },

            new SomeClass { SomeProperty = 97 },

            new SomeClass { SomeProperty = 95 }

        };

        SomeClass[] newArr = (SomeClass[])arr.Clone();

        newArr[0].SomeProperty = 100;

        Console.WriteLine(arr[0].SomeProperty);

    }

}