How to get Size in KB, MB, GB, TB, PB, EB, Bytes In C# Windows Application

Create Static Function

static String BytesToString(long byteCount)
        {
            string[] suf = { "B", "KB", "MB", "GB", "TB", "PB", "EB" }; //Longs run out around EB
            if (byteCount == 0)
                return "0" + suf[0];
            long bytes = byteCount;
            int place = Convert.ToInt32(Math.Floor(Math.Log(bytes, 1024)));
            double num = Math.Round(bytes / Math.Pow(1024, place), 2);
            return (Math.Sign(byteCount) * num).ToString() + suf[place];
        }

Write in Any Place Like This

private void Test_Load(object sender, EventArgs e)
        {
            MessageBox.Show(BytesToString(2000000).ToString());
        }