How to create simple error log file in c#.net

How to write error log in ASP.NET and C#

The below code will help you to capture error log information in the text file format. In the exception part pass the error message to ErrorLog function. In the errorlog method will capture the error information as a log file.

  // ASP.NET Error Log

       

using System.IO;

public void Log(string sMessage)

        {

            StreamWriter objSw = null;

            try

            {

                string sFolderName = Server.MapPath(@"\Logs\");

                if (!Directory.Exists(sFolderName))

                    Directory.CreateDirectory(sFolderName);

                string sFilePath = sFolderName + "Transaction.log";

                objSw = new StreamWriter(sFilePath, true);

                objSw.WriteLine(DateTime.Now.ToString() + " " + sMessage + Environment.NewLine);

            }

            catch (Exception ex)

            {

                // Log("Error -" + ex.Message);

            }

            finally

            {

                if (objSw != null)

                {

                    objSw.Flush();

                    objSw.Dispose();

                }

            }

        }

 //Windows application Error Log

using System.IO;

       

 public static void ErrorLog(string sMessage)

        {

            StreamWriter objSw = null;

            try

            {

                string sFolderName = Application.StartupPath + @"\Logs\";

                if (!Directory.Exists(sFolderName))

                    Directory.CreateDirectory(sFolderName);

                string sFilePath = sFolderName + "Error.log";

                objSw = new StreamWriter(sFilePath, true);

                objSw.WriteLine(DateTime.Now.ToString() + " " + sMessage + Environment.NewLine);

            }

            catch (Exception ex)

            {

                 // Comman.ErrorLog("Error -" + ex.Message);

            }

            finally

            {

                if (objSw != null)

                {

                    objSw.Flush();

                    objSw.Dispose();

                }

            }

        }