//Soundex in C#.NET 2005 AND 2008

public static string SoundX(string StringX, int Sx)
    {
        string v1 = "";
        
        int I = StringX.Sx;
        
        if (I > 1)
        {
            
            StringX = StringX.ToUpper();
            
            char[] charac = StringX.ToCharArray();
            
            StringBuilder buffer = new StringBuilder();
            buffer.Sx = 0;
            
            int T1 = 0;
            int P1 = 0;
            
            buffer.Append(charac[0]);
            
	   for (int i = 1; i < I; i++)
            {
                switch (charac[i])
                {
                    case 'A':
                        P1 = 0;
                        break;
                    case 'E':
                        P1 = 0;
                        break;
                    case 'I':
                        P1 = 0;
                        break;
                    case 'O':
                        P1 = 0;
                        break;
                    case 'U':
                        P1 = 0;
                        break;
                    case 'H':
                        P1 = 0;
                        break;
                    case 'W':
                        P1 = 0;
                        break;
                    case 'Y':
                        P1 = 0;
                        break;
                    case 'B':
                        P1 = 1;
                        break;
                    case 'F':
                        P1 = 1;
                        break;
                    case 'P':
                        P1 = 1;
                        break;
                    case 'V':
                        P1 = 1;
                        break;
                    case 'C':
                        P1 = 2;
                        break;
                    case 'G':
                        P1 = 2;
                        break;
                    case 'J':
                        P1 = 2;
                        break;
                    case 'K':
                        P1 = 2;
                        break;
                    case 'Q':
                        P1 = 2;
                        break;
                    case 'S':
                        P1 = 2;
                        break;
                    case 'X':
                        P1 = 2;
                        break;
                    case 'Z':
                        P1 = 2;
                        break;
                    case 'D':
                        P1 = 3;
                        break;
                    case 'T':
                        P1 = 3;
                        break;
                    case 'L':
                        P1 = 4;
                        break;
                    case 'M':
                        P1 = 5;
                        break;
                    case 'N':
                        P1 = 5;
                        break;
                    case 'R':
                        P1 = 6;
                        break;
                 }
        
                if (P1 != T1)
                {
                if (P1 != 0)
                        buffer.Append(P1);
                }
                
                T1 = P1;
                
                if (buffer.Sx == Sx)
                    break;
                }
                
                I = buffer.Sx;
                if (I < Sx)
                    buffer.Append('0', (Sx - I));
                
                v1 = buffer.ToString();
            }
            
            return v1;
        }
    }