Hi, I have a field in database that a string with seperator stored in it something like this flower,tree,leaf
how can I don't let admin add duplicate words to this string when he add new words like this by entering these words in a textbox?
greentree,tree,browntrees
for exmaple I dont want
flower,tree,leaf,tree,tree
I think I must do it by linq but I don't know how?
thanks.