throw new NotImplementedException() error

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C#

hi every one
ihave this error when save or delete something to or from data adapter

throw new NotImplementedException()

and this the function

internal void Insert(int p, int p_2, string p_3, System.DateTime dateTime, int p_5)
        {
            throw new System.NotImplementedException();
        }

        internal void Delete(int p, int p_2, string p_3, System.DateTime dateTime, int p_5)
        {
            throw new System.NotImplementedException();
        }
    }

i want to know what is this function , and about the code is not mine it come like a question in the exam and tell us to replace it but when i replace with add and delete function comes error , just i want if this right or wrong ,if wrong waht is right