sql Exception was handeled by user code

Question

using System.Data;

namespace WebApplication4
{
    public partial class _Default : System.Web.UI.Page
    {
       
        protected void Page_Load(object sender, EventArgs e)
        {

        }

        protected void btnSubmit_Click(object sender, EventArgs e)
        {
            string MyConnection=@"Data Source=SERVER03\SQLEXPRESS;Integrated Security=True";
             SqlConnection connection=new SqlConnection(MyConnection);
            connection.Open();
            string CmdText = "INSERT INTO DbBase(Name,Age,Sex)VALUES('"+txtName.Text+"','"+txtAge+"','"+txtSex+"')";
             SqlCommand cmd = new SqlCommand(CmdText, connection);
            
             int result = cmd.ExecuteNonQuery();
            

Line 27:              SqlCommand cmd = new SqlCommand(CmdText, connection);
Line 28:             
Line 29:              int result = cmd.ExecuteNonQuery();
Line 30:             
Line 31: 

Source File: c:\documents and settings\administrator\my documents\visual studio 2010\Projects\WebApplication4\WebApplication4\Default.aspx.cs    Line: 29 

Stack Trace: 

[SqlException (0x80131904): Invalid object name 'DbBase'.]
   System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection) +1948826
   System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) +4844747
   System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) +194
   System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) +2392
   System.Data.SqlClient.SqlCommand.RunExecuteNonQueryTds(String methodName, Boolean async) +192
   System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(DbAsyncResult result, String methodName, Boolean sendToPipe) +317
   System.Data.SqlClient.SqlCommand.ExecuteNonQuery() +137
   WebApplication4._Default.btnSubmit_Click(Object sender, EventArgs e) in c:\documents and settings\administrator\my documents\visual studio 2010\Projects\WebApplication4\WebApplication4\Default.aspx.cs:29
   System.Web.UI.WebControls.Button.OnClick(EventArgs e) +111
   System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +110
   System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +10
   System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13
   System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +36
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1565