C#

<br />
            //Start the Encryption process<br />
            FileStream fs = new FileStream(f, FileMode.Open);<br />
            byte[] data=new byte[1024];<br />
            while (true)<br />
            {<br />
                int i = fs.Read(data, 0, 1024);<br />
                if (i <= 0)<br />
                    break;<br />
                else<br />
                {<br />
                    CStreamWriter.Write(data, 0, 1024); //OUT OF MEMORY EXCEPTION HERE<br />
                    CStreamWriter.FlushFinalBlock();<br />
                }<br />
            }<br />

string number="1234";<br />
int total=0;<br />
<br />
for(int i=0;i<number.length;i++)><br />
{<br />
total+=Int32.Parse(number);<br />
}</number.length;i++)>

<code>
string s = "1234";
int total = 0;
foreach (char c in s)
{
    int x;
    int.TryParse(c.ToString(), out x);
    total += x;
}
</code>

<br />
string s = "1234";<br />
int total = s.ToCharArray().Sum((x) => int.Parse(x.ToString()));<br />

int total = s.ToCharArray().Sum((x) => ((int)x)-48);

Int32 num = 123456789;
Int32 sum = 0;
Int32 temp = num;
while (temp > 0) {
  sum += temp % 10;    // sum remainders
  temp = temp / 10;    // integer division
}
Console.WriteLine("Sum of all digits in {0} is {1}", num, sum);