Below is my code for create password which Including numbers and Letters and Password length is 6 chars.

 

public class PwCreator
	{
		public string Creator( )
		{
			String Vchar = "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,W,X,Y,Z";
			String[] VcArray = Vchar.Split(',');
			String VNum = "";
			Random random = new Random();
			for (int i = 1; i <= 6; i++)
			{
				int iNum = 0;
				while ((iNum = Convert.ToInt32(VcArray.Length * random.NextDouble())) == VcArray.Length)
				{
					iNum = Convert.ToInt32(VcArray.Length * random.NextDouble());
				}
				VNum += VcArray[iNum];
			}
			return VNum;
 

		}
	}

 the password Must mixed numbers and letters and can't have same char

when I test this code the problem is sometimes password is  numbers or letters only ... just can't find out how to modify it can you please help?

and also.. how to avoid a same numbers or same letters appear in password? 

thank you