Hello C#

Create a project with dotnet new console -o Hello, then cd Hello and dotnet run. The SDK builds and runs Program.cs.

Modern C# allows top-level statements: the file can start directly with Console.WriteLine("hello"); with no class or Main method written by you.

Statements end with ;. Comments are // for a line and /* ... */ for blocks. C# is case-sensitive: console is not Console.

Console.Write prints without a newline; Console.WriteLine adds one. String interpolation inserts values: $"2 + 3 = {2 + 3}".

Misses: forgetting the semicolon, writing print(...), and lowercase console.writeline.

// Program.cs
Console.WriteLine("hello");
Console.Write("no newline, ");
Console.WriteLine($"2 + 3 = {2 + 3}");