How to pass date parameter by using MS_Access

Question

//DAl code
public bool Insert(BOL.bolEmpLoanInstallments obj)
     {
       dbConnection conn =new dbConnection();
  string sql = "insert into EmpLoanInstallments(AppId,EmpId,LoanID,LoanType,NoOfInstallments,Premium,Amountsanctioned,LDate,Status,Paymentthrough,Activationstatus,RemainingAmount,Interest) values(@AppId,@EmpId,@LoanID,@LoanType,@NoOfInstallments,@Premium,@Amountsanctioned,'@Date,'pending',@Paymentthrough,@Activationstatus,@RemainingAmount,@Interest)";
  OleDbParameter[] oleDbParameters = new OleDbParameter[12];
  oleDbParameters[0] = new OleDbParameter("@AppId", OleDbType.Integer);
  oleDbParameters[0].Value = obj.AppId;
  oleDbParameters[1] = new OleDbParameter("@EmpId", OleDbType.VarChar);
  oleDbParameters[1].Value = obj.EmpId;
  //sqlParameters[1] = new SqlParameter("@LoanID", SqlDbType.VarChar);
  //sqlParameters[1].Value = obj.LoanID;
  oleDbParameters[2] = new OleDbParameter("@NoOfInstallments", OleDbType.Integer);
  oleDbParameters[2].Value = obj.NoOfInstallments;
  oleDbParameters[3] = new OleDbParameter("@Premium", OleDbType.Decimal);
  oleDbParameters[3].Value = obj.Premium;
  oleDbParameters[4] = new OleDbParameter("@AmountSanctioned", OleDbType.Decimal);
  oleDbParameters[4].Value = obj.AmountSanctioned;
  oleDbParameters[5] = new OleDbParameter("# @Date#", OleDbType.Date);
  oleDbParameters[5].Value = obj.LDate;
  oleDbParameters[6] = new OleDbParameter("@LoanType", OleDbType.VarChar);
  oleDbParameters[6].Value = obj.LoanType;
  oleDbParameters[7] = new OleDbParameter("@LoanID", OleDbType.VarChar);
  oleDbParameters[7].Value = obj.LoanID;
  oleDbParameters[8] = new OleDbParameter("@Paymentthrough", OleDbType.VarChar);
  oleDbParameters[8].Value = obj.Paymentthrough;
  oleDbParameters[9] = new OleDbParameter("@Activationstatus", OleDbType.VarChar);
  oleDbParameters[9].Value = obj.Activationstatus;
  oleDbParameters[10] = new OleDbParameter("@RemainingAmount", OleDbType.Decimal);
  oleDbParameters[10].Value = obj.RemainingAmount;
  oleDbParameters[11] = new OleDbParameter("@Interest", OleDbType.VarChar);
  oleDbParameters[11].Value = obj.Interest;
  return conn.executeInsertQuery(sql, oleDbParameters);

     }
//Bol Code

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace PayRoll.BOL
{
  class bolEmpLoanInstallments
  {
    DAL.dalEmpLoanInstallments dalObj= new PayRoll.DAL.dalEmpLoanInstallments();
    private Int32 m_Srlno;
  private string m_AppId;
    private string m_EmpId;
    private string m_Loanid;
    private string m_Loantype,m_Status;
  private string m_NoOfInstallments;
    private Decimal m_Premium;
    private Decimal m_Amountsanctioned;
    private DateTime m_date;
  private string m_Paymentthrough;
  private string m_Activationstatus;
  private Decimal m_RemainingAmount;
  private string m_Interest;
 
/// <constructor>
/// Constructor bolEmpLoanInstallments
/// </constructor>
    public bolEmpLoanInstallments()
    {
    //Initialize the variable here
    }
     /// <summary>
     /// ColumnName:Srlno
     /// Data Type:int
     /// Length:0
     /// </summary>
    public Int32 Srlno
    {
      get
      {
        return m_Srlno;
      }
      set
      {
        m_Srlno = value;
      }
    }
     /// <summary>
     /// ColumnName:Empid
     /// Data Type:VarChar
     /// Length:20
     /// </summary>
  public string AppId
  {
  get
  {
  return m_AppId;
  }
  set
  {
  m_AppId = value;
  }
  }
    public string EmpId
    {
      get
      {
        return m_EmpId;
      }
      set
      {
  if (value == "")
  {
  throw new InvalidData("Please select Employee Id", "Payroll", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
  }

        if (value.Length > 20)
        {
  throw new InvalidData("The Empid  is more length", "Payroll", MessageBoxButtons.OK, MessageBoxIcon.Warning);
        }
        m_EmpId = value;
      }
    }
     /// <summary>
     /// ColumnName:Loanid
     /// Data Type:VarChar
     /// Length:50
     /// </summary>
    public string LoanID
    {
      get
      {
        return m_Loanid;
      }
      set
      {
  if (value== "")
  {
  throw new InvalidData("Please Select Loan ID", "Payroll", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
  }
        if (value.Length > 50)
        {
  throw new InvalidData("The Loanid  is more length", "Payroll", MessageBoxButtons.OK, MessageBoxIcon.Warning);
        }
        m_Loanid = value;
      }
    }
     /// <summary>
     /// ColumnName:Loantype
     /// Data Type:VarChar
     /// Length:50
     /// </summary>
    public string LoanType
    {
      get
      {
        return m_Loantype;
      }
      set
      {
  if (value == "")
  {
  throw new InvalidData("Please select Loan type", "Payroll", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
  }
        if (value.Length > 50)
        {
  throw new InvalidData("The Loantype  is more length", "Payroll", MessageBoxButtons.OK, MessageBoxIcon.Warning);
        }
        m_Loantype = value;
      }
    }
     /// <summary>
     /// ColumnName:Installmentamountpermonth
     /// Data Type:decimal
     /// Length:0
     /// </summary>
    public string NoOfInstallments
  {
      get
      {
        return m_NoOfInstallments;
      }
      set
      {
  m_NoOfInstallments = value;
      }
    }
  public string Interest
  {
  get
  {
  return m_Interest;
  }
  set
  {
  if (value == "")
  {
  throw new InvalidData("Please Enter Interest", "Payroll", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
  }
  m_Interest = value;
  }
  }
     /// <summary>
     /// ColumnName:Amountsanctioned
     /// Data Type:decimal
     /// Length:0
     /// </summary>
    public Decimal AmountSanctioned
    {
      get
      {
        return m_Amountsanctioned;
      }
      set
      {
  //if (value == 0)
  //{
  //  throw new InvalidData("Please enter the amount");
  //}
        m_Amountsanctioned = value;
      }
    }
  public Decimal RemainingAmount
  {
  get
  {
  return m_RemainingAmount;
  }
  set
  {
  m_RemainingAmount = value;
  }
  }
     /// <summary>
     /// ColumnName:Approveddate
     /// Data Type:datetime
     /// Length:0
     /// </summary>
    public Decimal  Premium
    {
      get
      {
  return m_Premium;
      }
      set
      {
  m_Premium = value;
      }
    }
   
     /// <summary>
     /// ColumnName:Paiddate
     /// Data Type:datetime
     /// Length:0
     /// </summary>
    public DateTime LDate
    {
      get
      {
        return m_date;
      }
      set
      {
        m_date = value;
      }
    }
  public string Status
  {
  get
  {
  return m_Status;
  }
  set
  {
  if (value.Length == 0)
  {
  throw new InvalidData("Please select Loan Status", "Payroll", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
  }
  if (value.Length > 50)
  {
  throw new InvalidData("The LoanStatus  is more length", "Payroll", MessageBoxButtons.OK, MessageBoxIcon.Warning);
  }
  m_Status = value;
  }
  }
  public string Paymentthrough
  {
  get
  {
  return m_Paymentthrough;
  }
  set
  {
  if (value == "")
  {
  throw new InvalidData("Please enter payment through", "Payroll", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
  }
  m_Paymentthrough = value;
  }
  }
  public string Activationstatus
  {
  get
  {
  return m_Activationstatus;
  }
  set
  {
  m_Activationstatus = value;
  }
  }
    public bool Insert ()
    {
      dalObj.Insert(this);
      return true;
    }
  public bool Update()
  {
  dalObj.Update(this);
  return true;
  }
  public bool Update1()
  {
  dalObj.Update1(this);
  return true;
  }
  }
}

//Presentation layer code


  BOL.bolEmpLoanInstallments obj = new PayRoll.BOL.bolEmpLoanInstallments();
  String Sql = ""+cmbempid.Text+"";
  String[] Empid =Sql.Split('(');
  obj.AppId = txtloanappId.Text;
  obj.EmpId = Empid[0].ToString();
  // obj.LoanType = cmbloanidapplication.Text;
  //obj.LoanID = txtLoanID.Text;
  obj.LoanID = LnId;
  obj.LoanType = LType;
  //obj.LoanID = LnId;
  obj.AmountSanctioned = Convert.ToDecimal(txtamount.Text);
  obj.Premium = Convert.ToDecimal(txtpremiumamount.Text);
  obj.NoOfInstallments = Convert.ToString(nudinstallments.Value);
  obj.Interest = Convert.ToString(nudinterest.Value);
  obj.LDate = Convert.ToDateTime(dtpdate.Value); 
  obj.Paymentthrough = cmbPaymentthrough.Text;
  obj.Activationstatus = "0";
  obj.RemainingAmount = Convert.ToDecimal(txtamount.Text); 
  obj.Insert();
  MessageBox.Show("Record Saved sucessfully", "Payroll", MessageBoxButtons.OK, MessageBoxIcon.Information );
  clear();
  txtloanappId.Text = dbConnection.GetNextNumber("EmpLoanInstallments", "AppId").ToString();




my problem is not insert the data into database because exception occur in date format so please rectify the error