How to fix error "cannot implicitly convert type 'string'...

Question

am getting error  cannot implicitly convert type 'string' to systm.web.ui.controls

 

 

textAmount.Text =row.Cells[3].Controls[0].Text; 

 

 

am getting error while converting at .text,if i give .Tostring() no error but when iam updating the value updating as as system.web.ui.literal...