Basic resources added

- intro
- naming conventions
- access modifiers

src/content/resources/language/c-sharp/access-modifiers.md

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+---
+authors:
+  - "Stone_Red#2890"
+created_at: 2021/08/07
+title: C#
+external_resources:
+  - text: Access Modifiers
+    href: "https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/classes-and-structs/access-modifiers"
+---
+
+## Availible access modifiers
+
+- **public:** The type or member can be accessed by any other code in the same assembly or another assembly that references it.
+- **private:** The type or member can be accessed only by code in the same class or struct.
+- **protected:** The type or member can be accessed only by code in the same class, or in a class that is derived from that class.
+- **internal:** The type or member can be accessed by any code in the same assembly, but not from another assembly.
+- **protected internal:** The type or member can be accessed by any code in the assembly in which it's declared, or from within a derived class in another assembly.
+- **private protected:** The type or member can be accessed only within its declaring assembly, by code in the same class or in a type that is derived from that class.
+
+## Why not use _public_ for everything?
+
+Access modifiers control where members can be accessed and seen.
+If you were to make everything _public_, anyone could access the member without restrictions and possibly change variables to undesired values or call methods that should only be called on certain events.

src/content/resources/language/c-sharp/coding-conventions.md

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+---
+authors:
+  - "Stone_Red#2890"
+created_at: 2021/08/07
+title: C#
+external_resources:
+  - text: Coding Conventions
+    href: "https://docs.microsoft.com/en-us/dotnet/csharp/fundamentals/coding-style/coding-conventions"
+---
+
+## Naming conventions
+
+Coding conventions serve the following purposes:
+
+- They create a consistent look to the code, so that readers can focus on content, not layout.
+- They enable readers to understand the code more quickly by making assumptions based on previous experience.
+- They facilitate copying, changing, and maintaining the code.
+- They demonstrate C# best practices.
+
+### Pascal case
+
+Use pascal casing ("PascalCasing") when naming a class, record, interface or struct.
+
+```cs
+public class MessageService
+{
+}
+```
+
+```cs
+public record Temperature(double HighTemp, double LowTemp);
+```
+
+```cs
+public interface ISampleInterface
+{
+}
+```
+
+```cs
+public struct Coordinate
+{
+}
+```
+
+### Camel case
+
+Use camel casing ("camelCasing") when naming private or internal fields.
+
+```cs
+public class DataService
+{
+    private IWorkerQueue _workerQueue;
+}
+```
+
+When writing method parameters or local varibles, use camel casing.
+
+```cs
+public void SampleMethod(string name, int age)
+{
+    int index = 0;
+}
+```
+
+### Additional naming conventions
+
+Do not use Hungarian notation or any other type identification in identifiers.
+
+```cs
+//Do:
+int age;
+string name;
+//Don't:
+int iAge;
+string strName;
+```
+
+Use meaningful names for variables.
+
+```cs
+//Do:
+string factoryName;
+int age;
+//Don't
+string str;
+int i;
+```
+
+Do use prefix Any, Is, Have or similar keywords for boolean identifier.
+
+```cs
+public bool IsAvailable()
+{
+}
+```
+
+## Layout conventions
+
+- Use the default Code Editor settings (smart indenting, four-character indents, tabs saved as spaces). For more information, see Options, Text Editor, C#, Formatting.
+- Write only one statement per line.
+- Write only one declaration per line.
+- If continuation lines are not indented automatically, indent them one tab stop (four spaces).
+- Add at least one blank line between method definitions and property definitions.
+- Use parentheses to make clauses in an expression apparent, as shown in the following code.
+
+## Commenting conventions
+
+- Place the comment on a separate line, not at the end of a line of code.
+- Begin comment text with an uppercase letter.
+- End comment text with a period.
+- Insert one space between the comment delimiter (//) and the comment text, as shown in the following example
+
+```cs
+string password = Console.ReadLine();
+if(password == "1234")
+{
+    Console.WriteLine("Correct password!");
+}
+```
+
+```cs
+//Do:
+
+/// Calculates something.
+public int Calculate()
+{
+}
+
+//Don't:
+
+public int Calculate() //Calculates something
+{
+}
+```

src/content/resources/language/c-sharp/intro.md

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+---
+authors:
+  - "Stone_Red#2890"
+created_at: 2021/08/07
+title: C#
+---
+
+###### Documentation
+
+- [C# docs](https://docs.microsoft.com/en-us/dotnet/csharp/)
+
+###### Tutorials
+
+- [Introduction to C#](https://docs.microsoft.com/en-us/dotnet/csharp/tutorials/intro-to-csharp/)
+- [C# Fundamentals Development for Absolute Beginners:](https://channel9.msdn.com/Series/CSharp-Fundamentals-for-Absolute-Beginners)
+- [AngelSix's C# Beginner's course](https://www.youtube.com/watch?v=STw363BHviY&list=PLrW43fNmjaQXhWOKalftye87ObZA-xNIJ)
+
+###### Books
+
+- [Fundamentals of Computer Programming with C#](https://introprogramming.info/english-intro-csharp-book/)
+
+###### Others
+
+- [D#+](https://github.com/DSharpPlus/DSharpPlus/)
+- [D#+ Documentation](https://dsharpplus.github.io/)
+- [Discord.NET](https://github.com/RogueException/Discord.Net)
+- [Discord.NET Documentation](https://docs.stillu.cc/)