Apache.Avro schemaless files

CSharpAvroSchemaless.cs

// Invoice class generated from a avro protocol file (.avpr) using the nuget package Apache.Avro.Tools
Invoice invoice = new Invoice();
invoice.invoiceno = 123;
// ...(more invoice properties set here)

// set destination
string filePath = String.Format(@"C:\AvroInvoices\{0}.avro", invoice.invoiceNo);

// write avro schemaless file - logic adapted from https://stackoverflow.com/q/36793657/194872
SpecificDatumWriter<Invoice> writer = new SpecificDatumWriter<Invoice>(Invoice._SCHEMA);
FileStream outStream = new FileStream(filePath, FileMode.Create, FileAccess.Write);
Avro.IO.BinaryEncoder binaryEncoder = new Avro.IO.BinaryEncoder(outStream);
writer.Write(invoice, binaryEncoder);
outStream.Close();

// read in our schemaless file to verify we can load into an invoice object
SpecificDatumReader<Invoice> reader = new SpecificDatumReader<Invoice>(Invoice._SCHEMA, Invoice._SCHEMA);
FileStream inStream = new FileStream(filePath, FileMode.Open, FileAccess.Read);
Avro.IO.BinaryDecoder binaryDecoder = new Avro.IO.BinaryDecoder(inStream);
Invoice inv = reader.Read(null, binaryDecoder);
inStream.Close();