Answer 1

Answer 2

using System.Collections;
using System.Diagnostics;
using System.Management;

if (File.Exists(@"D:\New folder\Test0001.wav"))
{
    GC.Collect();
    GC.WaitForPendingFinalizers();
    FileInfo f = new FileInfo(@"D:\New folder\Test0001.wav");
    f.Delete();
}

Answer 3