In this help document, I will show you how to implement the search for duplicate values in dictionary in C#. You know, for an old bird, this is very simple code. But despite this, this is also a very useful help document for beginners in C#.
background: Most programmers usually handle small data source storage by creating dictionaries for key-value storage. Only when the primary key is, but the dictionary value may have duplicate elements.
The code is as follows
//initialize a dictionary with keys and values.
Dictionary<int, string> plants = new Dictionary<int, string>() {
{1,"Speckled Alder"},
{2,"Apple of Sodom"},
{3,"Hairy Bittercress"},
{4,"Pennsylvania Blackberry"},
{5,"Apple of Sodom"},
{6,"Water Birch"},
{7,"Meadow Cabbage"},
{8,"Water Birch"}
};
("<b>dictionary elements........ </b><br />");
//loop dictionary all elements
foreach (KeyValuePair<int, string> pair in plants)
{
( + "....."+ +"<br />");
}
//find dictionary duplicate values.
var duplicateValues = (x => ).Where(x => () > 1);
("<br /><b>dictionary duplicate values..........</b><br />");
//loop dictionary duplicate values only
foreach(var item in duplicateValues)
{
(+"<br />");
}
The above is what I use to find duplicate values in the dictionary. You can try experimenting.