C # takes an element out of the array and puts it in the first position

How do I remove an element in an array that matches a certain condition, and then put it at the front of the array, where the index is 0?

The idea is roughly as follows:
→ Locate an array element that matches the criteria, assign it to a temp variable, and note the index position of the array element, assuming that index
→ In the source array, starting from an array element with index 0, copy the index array element to another destination
→ Assign temporary variable temp to the target array where the index is 0

     Public Static class Arrhelper
    {
        <summary>
        Expands an array of type T, moving the element that satisfies the condition to the front of the array
        </summary>
        <typeparam name= "T" ></typeparam>
        <param name= "arr" > Source array </param>
        <param name= "Match" >LAMDA expression </param>
        <returns></returns>
         Public Static BOOL Movetofront<t> ( this t[] arr, predicate<t> match)
        {
            If the length of the array is 0
            if (arr.) Length = = 0)
            {
                return false;
            }
            Gets the index of the array element that satisfies the condition
            var index = Array.findIndex (arr, match);
            If an array element that satisfies the condition is not found
            if (Index = =-1)
            {
                return false;
            }
            Assigning an array element that satisfies a condition to a temporary variable
            var temp = Arr[index];
            Array.copy (arr, 0, arr, 1, index);
            ARR[0] = temp;
            return true;
        }
         Public Static void Printarray<t> (t[] arr)
        {
            foreach  in arr)
            {
                Console.Write (item + "");
            }
            Console.WriteLine ();
        }
    }

The above is an extension to a generic array, so you can call an extension method directly using an array instance.

    class Program
    {
        Static void Main (string[] args)
        {
            int New int []{1, 2, 3, 4, 5};
            Arrhelper.printarray (intarr);
            Intarr.movetofront (i = = 3);
            Arrhelper.printarray (intarr);
            Console.readkey ();
        }
    

C # takes an element out of the array and puts it in the first position