Handle errors in ASP.NET Core

if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
if (env.IsProduction() || env.IsStaging())
{
app.UseExceptionHandler(options =>
{
options.Run(async context =>
{
context.Response.StatusCode = 500;
context.Response.ContentType = “text/plain”;
await context.Response.WriteAsync(“CONTACT: 097 6060 432”);

var exceptionHandlerPathFeature =
context.Features.Get();
var now = System.DateTime.Now;
var eventLog = new EventLog
{
DateCreated = now,
RequestPath = exceptionHandlerPathFeature?.Path,
IPAddress = context.Request.HttpContext.Connection.RemoteIpAddress.ToString(),
Message = exceptionHandlerPathFeature?.Error.Source
};
string eventLogString = JsonConvert.SerializeObject(eventLog);

eventLogString += exceptionHandlerPathFeature?.Error.StackTrace + “\n\r”;

File.AppendAllText(“log.txt”, eventLogString);

ColorLife.Core.Helpers.IEmailProvider emailProvider = new ColorLife.Core.Helpers.EmailProvider(“[Urgent] Bug “, “[email protected]”);
emailProvider.Send(eventLogString, null);
});
});
app.UseHsts();
}