c# - ToolStripComboBox in overflow -

i created form tool strip menu. there lot of items in tool strip. items consist of toolstripbutton, toolstriplabel , toolstripcombobox.

problem combobox data source doesn't initialize when in overflow

this code

public partial class form2 : form {     public form2()     {         initializecomponent();     }      private void form2_load(object sender, eventargs e)     {         var data1 = new list<tvpair>{             new tvpair{                 text  = "text1",                 value = 1             },             new tvpair{                 text  = "text2",                 value = 2             },             new tvpair{                 text  = "text3",                 value = 3             },             new tvpair{                 text  = "text4",                 value = 4             },         };         toolstripcombobox1.combobox.displaymember = "text";         toolstripcombobox1.combobox.valuemember = "value";         toolstripcombobox1.combobox.datasource = data1;          var data2 = new list<tvpair>{             new tvpair{                 text  = "text1",                 value = 1             },             new tvpair{                 text  = "text2",                 value = 2             },             new tvpair{                 text  = "text3",                 value = 3             },             new tvpair{                 text  = "text4",                 value = 4             },         };         toolstripcombobox2.combobox.displaymember = "text";         toolstripcombobox2.combobox.valuemember = "value";         toolstripcombobox2.combobox.datasource = data2;     } } class tvpair {     public string text { get; set; }     public int value { get; set; } } 

sorry bad english. beforehand.