.NET C# byte[] to String sample

Sample array & string

byte[] array = new byte[] { 0x48, 0x65, 0x6C, 0x6C, 0x6F, 
                            0x57, 0x6F, 0x72, 0x6C, 0x64 }; //"HelloWorld"

byte[] to String

string str = System.Text.Encoding.Default.GetString(array);
string str = System.Text.Encoding.ASCII.GetString(array);           

byte[] to String

System.Text.ASCIIEncoding converter = new System.Text.ASCIIEncoding();
string str = converter.GetString(array);

HexString to byte[]

string str = ByteArrayToHex(array);
public static string ByteArrayToHex(byte[] array)
{
    System.Text.StringBuilder sb = new System.Text.StringBuilder();
    foreach (byte element in array)
        sb.Append(element.ToString("X2"));
    return sb.ToString();
}

.NET C# String to byte[] sample

Sample array & string

byte[] array = new byte[] { 0x48, 0x65, 0x6C, 0x6C, 0x6F, 
                            0x57, 0x6F, 0x72, 0x6C, 0x64 }; //"HelloWorld"

String to byte[]

byte[] array= System.Text.Encoding.Default.GetBytes("HelloWorld");
byte[] array= System.Text.Encoding.ASCII.GetBytes("HelloWorld");

String to byte[]

System.Text.ASCIIEncoding converter = new System.Text.ASCIIEncoding();
byte[] array = converter.GetBytes("HelloWorld");

HexString to byte[]

byte[] array = HexToByteArray("48656C6C6F56F726C64");
private static byte[] HexToByteArray(string hexString)
{
    byte[] returnBytes = new byte[hexString.Length / 2];
    for (int i = 0; i < returnBytes.Length; i++)
        returnBytes[i] = System.Convert.ToByte(hexString.Substring(i * 2, 2), 16);
    return returnBytes;
}

HexString to byte

byte element = HexToByte("48");
private static byte HexToByte(string hexString)
{
    if (hexString.Length > 2 || hexString.Length <= 0)
        throw new System.ArgumentException("hex must be 1 or 2 characters in length");
    byte newByte = byte.Parse(hexString, System.Globalization.NumberStyles.HexNumber);
    return newByte;
}

Console array Result

foreach (byte element in array)
{
	System.Console.WriteLine("{0}\t{1}\t{2} ", 
		(char)element, element, element.ToString("X2"));

}
/*
    H	72 48	
    e	101	65	
    l	108	6C	
    l	108	6C	
    o	111	6F	
    W	87	57	
    o	111	6F	
    r	114	72	
    l	108	6C	
    d	100	64	
*/