Comparing Two Lists

Question

I am having 2 lists. I should compare the 2 lists and should take the common value from both the list and i should put it in a string array...

First List....

List<string> IDs = new List<string>();
Dictionary<string, Test> group = TestProxy.GetNames(IDs.ToArray());

Second List...

List<string> Names = new List<string>();
Dictionary<string, Test> groupNames = TestProxy.GetSections(Names.ToArray());

How to take the common values...

Updated code....

        List<string> IDs = new List<string>();
        modulesIDs.Add("ID1");
        Dictionary<string, Group> group = PrivilegeProxy.GetNames(IDs.ToArray());

        List<string> Roles = new List<string>();
        Roles.Add("Role1");
        Dictionary<string, Role> Role = PrivilegeProxy.GetRoles(Roles.ToArray());


        Dictionary<string, "******"> common = group.Intersect(Role).ToDictionary(x => x.Key, x => x.Value);

        return common;

In the "common" Dictionary which object should i give ( " Dictionary common" )

whoa pal.. this changed the whole scope of the question... – naveen Feb 02 '11 at 12:14 — naveen, Feb 02 '11 at 12:14

score 4 · Accepted Answer · edited May 23 '17 at 12:13

4

Use Enumerable.Intersect and Enumerable.ToDictionary

    Dictionary<string, Test> commonGroups = group.Intersect(groupNames)
        .ToDictionary(x=>x.Key, x => x.Value);

Update: Read this if doubt persists. Recreating a Dictionary from an IEnumerable

edited May 23 '17 at 12:13

Community

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answered Feb 02 '11 at 10:55

naveen

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what should i give in ...x=>x.Key, x => x.Value – RobinHood Feb 02 '11 at 11:09
no need to change anything. just use the code as is. get back if you have an error – naveen Feb 02 '11 at 11:13

Comparing Two Lists

1 Answers1