Failed to convert parameter value from string builder to string

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C#

Hi sir ,
I am uday satardekar,

I am inserting 12000 rows using xml
and i am binding data using xml;
i am binging using StringBuilder

but when i am passing it to storded procedure it throws exception
Failed to convert parameter value from string builder to string

StringBuilder XML_TRANSACTIONDETAILS = new StringBuilder();

                    long maxid = getMaxId();
                    
                    int status;

                    //XML_TRANSACTIONDETAILS = "<master>";
                    XML_TRANSACTIONDETAILS.Append("<master>");

                    for (int i = 0; i < excelRows; i++)
                    {
                             maxid = maxid + 1;

                           // XML_TRANSACTIONDETAILS = XML_TRANSACTIONDETAILS + "<TRANSACTION>";
                            //XML_TRANSACTIONDETAILS = XML_TRANSACTIONDETAILS + "<maxid>" + maxid + "</maxid>";
                             XML_TRANSACTIONDETAILS.Append("<TRANSACTION>");
                             XML_TRANSACTIONDETAILS.Append("<maxid>" + maxid + "</maxid>");

                            for (int j = 0; j < ExcelColumnCount; j++)
                            {
                                string xmlTag = cleanedEmailTbl.Columns[j].ToString();

                               
                                XML_TRANSACTIONDETAILS.Append("<" + xmlTag + ">" + cleanedEmailTbl.Rows[i][j].ToString() + "</" + xmlTag + ">");
                           }
                           
                            XML_TRANSACTIONDETAILS.Append("</TRANSACTION>");
                    }
                    
                    XML_TRANSACTIONDETAILS.Append("</master>");

                    SqlParameter prm = new SqlParameter("@XML_TRANSACTIONDETAILS", SqlDbType.NText);
                    SqlParameter prm1 = new SqlParameter("@status", cmbAllStatus.SelectedValue);
                    SqlParameter prm2 = new SqlParameter("@username", currentLoggedUserId);
                    SqlParameter prm3 = new SqlParameter("@urlorcatalog", tboxUrlCat.Text);
                    SqlParameter prm4 = new SqlParameter("@dataentrytype", cmbDataEntryType.Text);
                 

                 
                    prm.Value = XML_TRANSACTIONDETAILS;

                    try
                    {
                        command.Connection = conn;
                        command.CommandText = "InsertExcelUsingXml";
                        command.CommandType = CommandType.StoredProcedure;

                        command.Parameters.Add(prm);
                        command.Parameters.Add(prm1);
                        command.Parameters.Add(prm2);
                        command.Parameters.Add(prm3);
                        command.Parameters.Add(prm4);

                        adapter = new SqlDataAdapter(command);
                        adapter.Fill(ds1, "rowsinserted");
                       
                        //after this lines exception comes
                       

                        int rows1 = command.ExecuteNonQuery();
                        transaction.Commit();