C#

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"All programmers are playwrights and all computers are lousy actors."

string str = "This is a test";
byte[] byteArray = new byte[str.Length];
for (int i=0;i < str.Length;i++)
    byteArray[i] = (byte) str[i];

string str = "This is a test";
byte[] byteArray = new byte[<font color=red>2*</font>str.Length];
for (int i=0;i < str.Length;i++)
{
    <font color=red>int c = (int)</font>str[i];
    byteArray[<font color=red>2*</font>i] = (byte) c;
    <font color=red>byteArray[2*i+1] = (byte)(c>>8);</font>
}    

byteArray[2*i] = (byte) str[i];
byteArray[2*i+1] = 0;

ASCIIEncoding ae = new ASCIIEncoding();
byte[] byStr = ae.GetBytes(str);

string str = "this|is|a|test";
string[] arr = str.Split('|');

// arr == { 'this', 'is', 'a', 'test' }
// alternatively...

string str = "this|is,a|test";
string[] arr = str.Split('|', ',');

// gives the same result.

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"When the only tool you have is a hammer, a sore thumb you will have."