Datevalue is getting appended if i try to insert only time value into database

The table schema:

CREATE TABLE [dbo].[Sales_main](
[Receipt_no] [decimal](18, 0) NOT NULL,
[Receipt_Date] [datetime] NOT NULL,
[Receipt_Time] [datetime] NOT NULL,
[User_id] [nvarchar](255) NOT NULL,
[Total_amt] [float] NOT NULL,
[Discount] [float] NOT NULL,
[To_pay] [float] NOT NULL,
[Paid] [float] NOT NULL,
[Balance] [float] NOT NULL,
[roundoff_amount] [float] NOT NULL,
[CreatedID] [varchar](50) NULL,
[CreatedDateTime] [smalldatetime] NULL,
[UpdatedID] [varchar](50) NULL,
[UpdatedDateTime] [smalldatetime] NULL)

My sql query looks like this

sql = "insert into Sales_main(Receipt_no,Receipt_Date,Receipt_Time,User_id,Total_amt,Discount,To_pay,Paid,Balance,roundoff_amount,CreatedID,CreatedDateTime) values(" + bosales.Receipt_no + ",'" + bosales.Receipt_Date.ToString("dd-MMM-yyyy") + "','" + bosales.Receipt_Time.ToString("t") + "','" + bosales.User_id + "'," + bosales.Total_amt + "," + bosales.Discount_amt + "," + bosales.Amt_tobe_paid + "," + bosales.Amt_paid + "," + bosales.Balance + "," + bosales.Roundoff + ",'" + bosales.Createdid + "','" + bosales.Createddate.ToString("dd-MMM-yyyy") + "')";

The output of this query is:

43  |27/01/2015 12:00:00 AM |01/01/1900 5:00:00 PM  |admin  |20 |0  |20 |20 |0  |0  |admin  |27/01/2015 12:00:00 AM |NULL   |NULL

I want only time value(5:00:00 PM) to be inserted rather than 01/01/1900 5:00:00 PM.

Please help me out.