1.
Bye Bye WCF,
hello gRPC
@svswaminathan
.NET Conf Local Bengaluru – Oct 19, 2019
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2.
Swaminathan Vetri
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Technical Architect,
Maersk | Microsoft
MVP
Speaking, Blogging,
Photography,
Travelling
Gadget freak
Twitter :
@svswaminathan
Blog :
swaminathanvetri.in

3.
Agenda
• State of WCF in .NET Core 3.0 ?
• What is gRPC ?
• Why gRPC ?
• What it offers ?
• gRPC – C Core vs gRPC-dotnet
• Demos

4.
State of WCF in .NET Core 3.0
• What didn’t make it to .NET Core 3.0 ?
• WCF Server, Workflow, ASP.NET WebForms, Remoting, App Domains
• Core WCF – open source community project
• WCF Client components are part of .NET Core 3.0
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5.
What is gRPC ?
• gRPC is a modern open source high
performance RPC framework that can run in
any environment
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6.
Protocol Buffers
• Protocol buffers are a flexible, efficient, automated mechanism for serializing structured data –
think XML, but smaller, faster, and simpler
Sample proto format
message Person
{ string name = 1;
int32 id = 2;
bool has_ponycopter = 3;
}
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7.
Why Protocol Buffers ?
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Simpler 3 to 10 times smaller 20 to 100 times faster Less ambiguous Generate data access
classes that are easier to
use programmatically

8.
How gRPC works ?
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9.
Why gRPC?
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PERFORMANCE INTEROPERABILITY USABILITY &
PRODUCTIVITY
STREAMING SECURITY

10.
What it offers ?
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11.
WCF vs gRPC
WCF
• Service Contract, Operation Contract, and Data
Contract
• Contracts written in C# or Visual Basic
• Configurable, including SOAP/XML, Plain XML,
JSON, .NET Binary, and so on.
• Interop when using SOAP over HTTP
• Networking configured at runtime. Switch
between TCP, HTTP, MSMQ, and so on.
• Runtime generation of serialization
/deserialization and networking code in base
classes
• Authentication, WS-Security, message encryption
gRPC
• Uses proto file to declare services and messages
• Protocol Buffer language
• Protocol Buffer binary format (although it’s
possible to use other formats).
• Official support: .NET, Java, Python, JavaScript,
C/C++, Go, Rust, Ruby, Swift, Dart, PHP. Unofficial
support for other languages from the community.
• Always HTTP/2
• Build-time generation of serialization
/deserialization and networking code in base
classes
• Credentials, ASP.NET Core security, TLS networking
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Source : http://aka.ms/grpcforwcfebook

12.
grpc c-core vs grpc-dotnet
• Source : https://grpc.io/blog/grpc-on-dotnetcore/
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13.
References
• https://devblogs.microsoft.com/dotnet/net-core-is-the-future-of-
net/
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