GenerateRandomName for images in asp.net 2.0 using c#

public string GenerateRandomName()
{

string allowedChars = "";
allowedChars = "a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z,";
allowedChars += "A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z,";
allowedChars += "1,2,3,4,5,6,7,8,9,0";
char[] sep ={ ',' };
string[] arr = allowedChars.Split(sep);
string fname = "";
string temp = "";
Random rand = new Random();
for (int i = 0; i < 10; i++)
{
temp = arr[rand.Next(0, arr.Length)];
fname += temp;
}
return fname;
}

just call this like::
string getrandomname = GenerateRandomName;

Happy Coding..!!