unsafe_array.cs

public unsafe class UnsafeUIntArray
{
    public int Length { get; init; }
    
    private readonly uint[] _data;
    private readonly uint* _dataPtr;

    public UnsafeUIntArray(int length)
    {        
        Length = length;
        _data = GC.AllocateArray<uint>(length, pinned: true);
        ref uint dataRef = ref MemoryMarshal.GetArrayDataReference(_data);
        _dataPtr = (uint*)Unsafe.AsPointer<uint>(ref dataRef);
    }
   
    public uint this[int key]
    {
        get => Get(key);
        set => Set(key, value);
    }    

    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    public unsafe uint Get(int index)
    {
        var ptr = (_dataPtr + (uint)index);
        return *ptr;
    }

    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    public unsafe void Set(int index, uint value)
    {
        var ptr = (_dataPtr + (uint)index);
        *ptr = value;
    }

}