ado.net sqlparameter in localize language

Dim cmd As New SqlCommand
     Dim dt As New DataTable
     Dim dr As SqlDataReader
     dt.TableName = "temp"
     Try
         If Not conn.State = ConnectionState.Closed Then conn.Close()
         If conn.State = ConnectionState.Closed Then conn.Open()
         cmd.Connection = conn
         Dim qry As String =  "Select * from users WHERE [Name]=@UserName AND [Pwd]=@Password"
         cmd.commandtext = qry
         cmd.Parameters.Add("@UserName", SqlDbType.NVarChar, 50).Value = "ادمین"
         cmd.Parameters.Add("@Password", SqlDbType.NVarChar, 50).Value = "ادمین"
         dr = cmd.ExecuteReader(CommandBehavior.CloseConnection)
            If dr.HasRows Then
                dt.Load(dr)
            End If

            Return dt
        Catch ex As Exception
            Return Nothing
        Finally
            dt = Nothing
            cmd.Connection = Nothing
            cmd.Parameters.Clear()
            cmd.Dispose()
        End Try

declare @UserName nvarchar(50) = 'ادمين'
declare @Password nvarchar(50)= 'ادمين'
select * from Users where [name]=@UserName and [Pwd] = @Password

Dim cmd As New SqlCommand
        Dim dt As New DataTable
        Dim dr As SqlDataReader
        Dim pLoginName As String = "ادمین"
        Dim pPassword As String = "ادمین"
        dt.TableName = "temp"
        Try
            If Not conn.State = ConnectionState.Closed Then conn.Close()
            If conn.State = ConnectionState.Closed Then conn.Open()
            cmd.Connection = conn
            Dim qry As String ="Select * from users WHERE [Name]='" & pLoginName & "' AND [Pwd]='" & pPassword & "'"
 cmd.CommandText = qry
           dr = cmd.ExecuteReader(CommandBehavior.CloseConnection)
            If dr.HasRows Then
                dt.Load(dr)
            End If

            Return dt
        Catch ex As Exception
            Return Nothing
        Finally
            dt = Nothing
            cmd.Connection = Nothing
            cmd.Parameters.Clear()
            cmd.Dispose()
        End Try