Question

How to assign the result of the Linq Query to a dictionary…

 public Dictionary<string, Privilege> GetAllPermissionsByGroupId(string groupid)
    {

        string[] Roles = new string[] { "e8b08a45-9cb5-4ac9-8c6c-9dfe4ac23966$Moderator" };

        List<RolePrivilege> RoleList = new List<RolePrivilege>();
        List<Privilege> PrivilegeList = new List<Privilege>();

        Dictionary<string, RolePrivilege> Role = PrivilegeProxy.GetPrivilegesForRoles("744A2BE3-846E-4E4A-9796-DAF9C743E8FF", Roles);
        RoleList = Role.Values.ToList();


        Dictionary<string, Privilege> Privilege = PrivilegeProxy.GetPrivilegesbyModuleIds(new string[] { "Groups" });
        PrivilegeList = Privilege.Values.ToList();

        var identicalQuery = from roles in RoleList
                            join privileges in PrivilegeList on roles.PrivilegeName equals privileges.Name
                           select new { Roles = roles, Privileges = privileges };


        Dictionary<string, Privilege> Result=new Dictionary<string,Privilege>();
         Result=?


         return Result;

    }

Answer 1

Actually you code does not illustrate what you desire to put into dictionary. What should be key? String associated with RolePrivilege?

Nevermind, I would recommend work with pairs instead of values in your dictionaries:

var Roles = new string[] { "e8b08a45-9cb5-4ac9-8c6c-9dfe4ac23966$Moderator" };
Dictionary<string, RolePrivilege> Role = PrivilegeProxy.GetPrivilegesForRoles("744A2BE3-846E-4E4A-9796-DAF9C743E8FF", Roles);
Dictionary<string, Privilege> Privilege = PrivilegeProxy.GetPrivilegesbyModuleIds(new string[] { "Groups" });

var identicalQuery = from roles in Role
                     join privileges in Privilege on roles.Value.PrivilegeName equals privileges.Value.Name
                     select new { Roles = roles, Privileges = privileges };

Dictionary<string, Privilege> Result = identicalQuery.ToDictionary(_ => _.Roles.Key, _.Privileges.Value);

EDITED

Okay, let’s imagine contents of both dictionaries:

• Role dic = [{“aaa”, RolePrivilege1}, {“bbb”, RolePrivilege2}, {“ccc”, RolePrivilege3}]
• Privilege dic = [{“aaa”, Privilege5}, {“bbb”, Privilege6}, {“ddd”, Privilege7}]

What do you expect as output?
I suppose you want to get next sequense:

• Result = [{“aaa”, Privilege5}, {“bbb”, Privilege6}]

Correct? If yes, this request will help:

        var Result = Role
            .Join(Privilege,
                outer => outer.Key,
                inner => inner.Key,
                (outer, inner) => new { Str = outer.Key, Privilege = inner.Value })
            .ToDictionary(_ => _.Str, _ => _.Privilege);