Error after deploying asp.net core app to azure

Question

After deploying my asp.net core app to azure for the first time and ran it, I got the following error:

Error. An error occurred while processing your requ

Answer 1

It is a security measure used in production mode so that any user does not got sensitive exception information from our app.

You can change ASPNETCORE_ENVIRONMENT from "Production" to "Development".

Another option is to change the code for the Configure () method in Startup.cs. It is this method makes a validation:

public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
    if (env.IsDevelopment())
    {
        app.UseDeveloperExceptionPage();
    }
    else
    {
        app.UseExceptionHandler("/Error");
    }

    ...
}

It is not recommended, but you can eliminate this condition:

public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
    app.UseDeveloperExceptionPage();
    ...
}