Consider this code:
```
var dropDown = sheet.DataValidations.AddListValidation(cells[2, colIndex, maxCol, colIndex].Address);
foreach (var bb in brokerBranchs)
{
dropDown.Formula.Values.Add(bb.Title);
}
```
When dropDown count is 29 all thing is ok but when greater than 29 i get error

Comments: tanx swmal I solved my probled and you see in this URL http://stackoverflow.com/questions/20259692/epplus-number-of-drop-down-items-limitation-in-excel-file/20282270#20282270
```
var dropDown = sheet.DataValidations.AddListValidation(cells[2, colIndex, maxCol, colIndex].Address);
foreach (var bb in brokerBranchs)
{
dropDown.Formula.Values.Add(bb.Title);
}
```
When dropDown count is 29 all thing is ok but when greater than 29 i get error

Comments: tanx swmal I solved my probled and you see in this URL http://stackoverflow.com/questions/20259692/epplus-number-of-drop-down-items-limitation-in-excel-file/20282270#20282270