C#比较相似的字符串

public static int ComputeLevenshteinDistance(string s, string t)
{
    int n = s.Length;
    int m = t.Length;
    int[,] d = new int[n + 1, m + 1];

    if (n == 0) return m;
    if (m == 0) return n;

    for (int i = 0; i <= n; d[i, 0] = i++) ;
    for (int j = 0; j <= m; d[0, j] = j++) ;

    for (int i = 1; i <= n; i++)
    {
        for (int j = 1; j <= m; j++)
        {
            int cost = (t[j - 1] == s[i - 1]) ? 0 : 1;
            d[i, j] = Math.Min(
                Math.Min(d[i - 1, j] + 1, d[i, j - 1] + 1),
                d[i - 1, j - 1] + cost);
        }
    }
    return d[n, m];
}