System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index at System.Collections.ArrayList.RemoveAt(Int32 index) at System.Web.UI.WebControls.ListItemCollection.RemoveAt(Int32 index) at EmpFormRegistration.bindCompany() in c:\IIS\gnsu.org\ERP\Employee\EmpFormRegistration.aspx.cs:line 75bindCompanySystem.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index at System.Collections.ArrayList.RemoveAt(Int32 index) at System.Web.UI.WebControls.ListItemCollection.RemoveAt(Int32 index) at EmpFormRegistration.bindBranch() in c:\IIS\gnsu.org\ERP\Employee\EmpFormRegistration.aspx.cs:line 95bindBranchSystem.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index at System.Collections.ArrayList.RemoveAt(Int32 index) at System.Web.UI.WebControls.ListItemCollection.RemoveAt(Int32 index) at EmpFormRegistration.bindSession() in c:\IIS\gnsu.org\ERP\Employee\EmpFormRegistration.aspx.cs:line 111bindsessionSystem.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index at System.Collections.ArrayList.RemoveAt(Int32 index) at System.Web.UI.WebControls.ListItemCollection.RemoveAt(Int32 index) at EmpFormRegistration.bindStaffCategory() in c:\IIS\gnsu.org\ERP\Employee\EmpFormRegistration.aspx.cs:line 60bindStaffCategory