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+### To Do:
+- Understand hosting models
+- Blazor WebAssembly
+- Blazor client-side
+- Blazor server
+- SignalR
+- Blazor hybrid  
+- Diagrams? 
+
+--------------------
+
+### What is Blazor?
+
+Blazor is a framework for building interactive web user interfaces (UIs) using C# and HTML. It allows you to:
+- Create web apps that run in the browser using WebAssembly (WASM) or on the server.
+- Integrate seamlessly with JavaScript.
+- Enjoy the performance benefits of .NET.
+
+### ASP.NET Core Blazor
+
+Blazor is part of the ASP.NET Core suite, which includes:
+- **ASP.NET Core MVC**: For building web apps using the Model-View-Controller pattern.
+- **ASP.NET Core Razor Pages**: For building dynamic web pages.
+- **ASP.NET Core Blazor**: For building interactive web UIs.
+
+### ASP.NET Core Platform
+
+The ASP.NET Core platform provides several key components:
+- **Kestrel**: A web server for ASP.NET Core.
+- **Middleware**: Components for handling HTTP requests.
+- **Razor**: A syntax for combining HTML and C#.
+- **Model Binding**: For mapping data from HTTP requests to action method parameters.
+- **Dependency Injection**: For managing object dependencies.
+- **Logging**: For tracking application activity.
+
+### Understanding Hosting Models
+
+Blazor supports different hosting models:
+- **WebAssembly**: Runs .NET code in the browser using WebAssembly.
+- **Server**: Runs on the server and interacts with the client via SignalR.
+- **Hybrid**: Combines server-side and client-side processing.
+
+
+IL interpreter 
+deployed as static files
+.net runtime runs inside the browser.
+
+Blazor server
+* ASP on server in ASP.NET core app
+* backend by SignalR connection
+* application instance is created per "circuit"
+
+blazor is .net frontend web framework that supports server side rendering and client interactivity
+in a single programming model
+
+* rich interactive UIs using C#
+* share server side and client side app logic written in .NET
+* render the UI as HTML and CSS for wide browser support, including mobile browser.
+* build hybrid desktop and mobile apps with .NET and blazor. 
+
+### Components in Blazor
+
+Components are the building blocks of Blazor applications. They are:
+- .NET C# classes compiled into .NET assemblies.
+- Designed to handle flexible UI rendering and user events.
+- Nestable and reusable.
+- Shareable and distributable as Razor class libraries or NuGet packages.
+
+### Full Stack Web Development with Blazor
+
+Blazor supports comprehensive web development features:
+- **Dependency Injection**: For managing dependencies.
+- **Layouts**: For consistent look and feel across pages.
+- **JavaScript Interoperability**: For integrating with JavaScript code.
+- **Client-Side Routing**: For navigating between pages.
+- **Forms**: For handling user input.
+
+
+