Sample code to scramble a Word using C# String object

I was developing a small C# program to generate and print Scrambled Words puzzle for kids, which are generally called 'Jumbled Words' by many children. I was looking for some C# or VB.NET sample code to scramble the letters in the given word.

For example, if the given word is "POLICE", I should be able to randomly scramble the letters in the word and generate new word something like this: "COLPIE" or "ICELPO".

I found a couple of examples in various sites, but I wasn't convinved with most of them. So I decided to write a sample myself. Here is the code I came with to scramble the given word to develop my Jumbled Words puzzle:

public string ScrambleWord(string word)
{
    char[] chars = new char[word.Length];
    Random rand = new Random(10000);

    int index = 0;

    while (word.Length > 0)
    {
        // Get a random number between 0 and the length of the word.
        int next = rand.Next(0, word.Length - 1);  

        // Take the character from the random position and add to our char array.
        chars[index] = word[next];  

        // Remove the character from the word.
        word = word.Substring(0, next) + word.Substring(next + 1); 

        ++index;
    }

    return new String(chars);
}

string word = "POLICE";
string scrambled_Word = ScrambleWord(word);