Question

I was tried like so:

using System;
using System.Windows.Forms;
using Microsoft.SqlServer.Management.Common;
using Microsoft.SqlServer.Management.Trace;

namespace SqlProfiller
{
    public partial class Form1 : Form
    {
        TraceServer reader = new TraceServer();
        SqlConnectionInfo connInfo = new SqlConnectionInfo();

        public Form1()
        {
            InitializeComponent();

        }

        private void button1_Click(object sender, EventArgs e)
        {
            connInfo.ServerName = @".\SQLR2";
            connInfo.DatabaseName = "DB";
            connInfo.UserName = "sa";
            connInfo.Password = "123";

            reader.InitializeAsReader(connInfo, @"Standard.tdf");


            while (reader.Read())
            {
                Console.WriteLine("SPID  : " + reader["SPID"]);
                Console.WriteLine("Login : " + reader["SessionLoginName"]);
                Console.WriteLine("Object: " + reader["ObjectName"]);
                Console.WriteLine("Text  : " + reader["TextData"]);
                Console.WriteLine();

                textBox1.Text += "Event : " + reader["EventClass"] + Environment.NewLine;
                textBox1.Text += "SPID  : " + reader["SPID"] + Environment.NewLine;
                textBox1.Text += "Login : " + reader["SessionLoginName"] + Environment.NewLine;
                textBox1.Text += "Object: " + reader["ObjectName"] + Environment.NewLine;
                textBox1.Text += "Text  : " + reader["TextData"] + Environment.NewLine;
                textBox1.Text += "----------------------------------------------------------";
                textBox1.Text += Environment.NewLine;
                Application.DoEvents();
            }
        }
    }
}

Error:

Microsoft.SqlServer.Management.Trace.SqlTraceException: Failed to
initialize object as reader. —> System.IO.FileLoadException: Mixed
mode assembly is built against version ‘v2.0.50727’ of the runtime and
cannot be loaded in the 4.0 runtime without additional configuration
information.

Failed to initialize object as reader.

What does this mean?

Thanks in advance

Answer 1

What does this mean?

System.IO.FileLoadException: Mixed mode assembly is built against version 'v2.0.50727' of the runtime and cannot be loaded in the 4.0 runtime without additional configuration information.

It means that your process in running as a .NET 4 process and the assembly you are loading is .NET 2 compiled (Microsoft.SqlServer.Management).

Either recompile your application to use .NET 2 or add a hint for .NET 4 in config to allow .NET 2 assemblies.