/// <summary>
/// Fetches data asynchronously from the FRED series/observations service endpoint and saves the result to a ZIP file.
/// </summary>
/// <param name="filePath">The file path at which to save the ZIP file.</param>
/// <param name="overwrite">Indicates whether or not to overwrite the contents of an existing ZIP file. The default is true.</param>
/// <returns>A Task of type Boolean, the resolution of which indicates whether or not the operation succeeded.</returns>
public async Task <bool> FetchAsync(string filePath, bool overwrite = true)
{
try
{
if (!overwrite && File.Exists(filePath))
{
Exception = new Exception("File " + filePath + " already exists.");
return(false);
}
Request = new FileRequest {
FilePath = filePath, Excel = Excel
};
Arguments.ApiKey = ApiKey;
await Request.FetchAsync <object>(Arguments);
SetResultProperties();
return(Exception == null);
}
catch (Exception exception)
{
Exception = exception;
}
return(false);
}