GroupCollection collGroup = SPContext.Web.SiteGroups; Group oGroup1 = collGroup.GetByName("UserList"); Group oGroup2 = collGroup.GetByName(securityGroupName); UserCollection oUserCollection1 = oGroup1.Users; UserCollection oUserCollection2 = oGroup2.Users; SPContext.Load(oUserCollection1); SPContext.Load(oUserCollection2); SPContext.ExecuteQuery(); var uname = oGroup1.Users.GetByEmail(useremail); var userCheck = oUserCollection2.Where(u => u.Email == useremail).FirstOrDefault(); if (userCheck == null) { Microsoft.SharePoint.Client.User oUser2 = oGroup2.Users.AddUser(uname); } SPContext.ExecuteQuery();
var
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