richlander

using System;
using System.Linq;
using System.Collections.Generic;
using static System.Console;
using System.IO;

namespace usingapp
{
    class Program
    {

richlander

var paths = new string[] {@"C:\myapp\mscorlib.dll", @"C:\myapp\myapp.dll"};
var resolver = new PathAssemblyResolver(paths);
using (var lc = new MetadataLoadContext(resolver))
{
    Assembly a = lc.LoadFromAssemblyName("myapp");
    Type myInterface = a.GetType("MyApp.IPluginInterface");
    foreach (Type t in a.GetTypes())
    {
        if (t.IsClass && myInterface.IsAssignableFrom(t))
            Console.WriteLine($"Class {t.FullName} implements IPluginInterface");

richlander

interface ILogger
{
    void Log(LogLevel level, string message);
    void Log(Exception ex) => Log(LogLevel.Error, ex.ToString()); // New overload
}
class ConsoleLogger : ILogger
{
    public void Log(LogLevel level, string message) { ... }
    // Log(Exception) gets default implementation
}

richlander

var slice = a[i1..i2]; // { 3, 4, 5 }

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Index i1 = 3;  // number 3 from beginning
Index i2 = ^4; // number 4 from end
int[] a = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
Console.WriteLine($"{a[i1]}, {a[i2]}"); // "3, 6"

richlander

private static ReadOnlySpan<byte> CRLF => new byte[] { (byte)'\r', (byte)'\n' };

public static void ReadLines(ReadOnlySequence<byte> sequence)
{
    SequenceReader<byte> reader = new SequenceReader<byte>(sequence);

    while (!reader.End)
    {
        if (!reader.TryReadToAny(out ReadOnlySpan<byte> line, CRLF, advancePastDelimiter:false))
        {

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async IAsyncEnumerable<int> GetBigResultsAsync()
{
    await foreach (var result in GetResultsAsync())
    {
        if (result > 20) yield return result; 
    }
}

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public static void Utf8JsonReaderLoop(ReadOnlySpan<byte> dataUtf8)
{
    var json = new Utf8JsonReader(dataUtf8, isFinalBlock: true, state: default);

    while (json.Read())
    {
        JsonTokenType tokenType = json.TokenType;
        ReadOnlySpan<byte> valueSpan = json.ValueSpan;
        switch (tokenType)
        {

richlander

{
  "version": 1,
  "isRoot": true,
  "tools": {
    "dotnetsay": {
      "version": "2.1.4",
      "commands": [
        "dotnetsay"
      ]
    },

richlander

{
  "version": 1,
  "isRoot": true,
  "tools": {}
}