HELP HELP..entity framework inserting duplicate records mvc?

Question

ex : 

foreach()

{

data; 

}

\\only insert list of zero items record only.but it inserting dublicate records....

 currentdb.saveentity(listof[0]items, true);

 

 

but it inserting  duplicate records in mvc.

please help me.previously if anybody faced this type of issue.please give me a code.

please provide code this.thank you for your time..