Send email notification on errors in C# console

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C#

.NET

i have working on consuming web api c# console.
i have manage error handling through seprate error handling program using Amazon classes. Now
i want send email when there is any exception and exception is stored in a file.
this is done in Program.cs file in main() method.

What I have tried:

ResultToFileModel resultToFile = new ResultToFileModel();
try
{
    resultToFile.errors.Add(new ErrorModel
    {
        CrDatTime = CommonHandler.ConvertDatetime_UTCtoEST(),
        LogLevel = LogLevel.Information.ToString(),
        MsgDetails = "please check your email",
        SourceMethodName = "Service Initiated"
    });
}
catch (Exception ex)
{
    resultToFile.errors.Add(new ErrorModel
    {
        CrDatTime = CommonHandler.ConvertDatetime_UTCtoEST(),
        LogLevel = LogLevel.Error.ToString(),
        MsgDetails = ex.Message,
        SourceMethodName = ex.TargetSite.Name
    });
    string projectLogFolder = Environment.GetEnvironmentVariable("projectLogFolder");
    while (ex.InnerException != null)
    {
        ex = ex.InnerException;
        foreach (DictionaryEntry de in ex.Data)
        {
            resultToFile.errors.Add(new ErrorModel
            {
                CrDatTime = CommonHandler.ConvertDatetime_UTCtoEST(),
                LogLevel = LogLevel.Error.ToString(),
                MsgDetails = " Error Description - Key: " + de.Key + " Value: " + de.Value,
                SourceMethodName = ex.TargetSite.Name,
                JsonErrMessage = ex.Message
            });
        }
    }
    string localFileName = string.Empty;
    if (resultToFile.errors.Exists(t => t.LogLevel == LogLevel.Error.ToString()))
    {
        localFileName = resultToFile.fileNameToSave + "_error." + "csv";
    }
    else
    {
        localFileName = resultToFile.fileNameToSave + "_success." + "csv";
    }
    string keyName = projectLogFolder + "/" + localFileName;
    SendMail.SendMailMessage(keyName);
}