diff --git a/20240919/ConsoleApp1/.vs/ConsoleApp1/FileContentIndex/72ab0ad0-d936-423c-8f34-b3444a674a60.vsidx b/20240919/ConsoleApp1/.vs/ConsoleApp1/FileContentIndex/72ab0ad0-d936-423c-8f34-b3444a674a60.vsidx
new file mode 100644
index 0000000..bd71998
Binary files /dev/null and b/20240919/ConsoleApp1/.vs/ConsoleApp1/FileContentIndex/72ab0ad0-d936-423c-8f34-b3444a674a60.vsidx differ
diff --git a/20240919/ConsoleApp1/.vs/ConsoleApp1/v17/.suo b/20240919/ConsoleApp1/.vs/ConsoleApp1/v17/.suo
new file mode 100644
index 0000000..64b79ed
Binary files /dev/null and b/20240919/ConsoleApp1/.vs/ConsoleApp1/v17/.suo differ
diff --git a/20240919/ConsoleApp1/.vs/ConsoleApp1/v17/DocumentLayout.backup.json b/20240919/ConsoleApp1/.vs/ConsoleApp1/v17/DocumentLayout.backup.json
new file mode 100644
index 0000000..58595c9
--- /dev/null
+++ b/20240919/ConsoleApp1/.vs/ConsoleApp1/v17/DocumentLayout.backup.json
@@ -0,0 +1,37 @@
+{
+ "Version": 1,
+ "WorkspaceRootPath": "C:\\Users\\szabomarton\\Desktop\\C#\\ProgaOra\\20240919\\ConsoleApp1\\",
+ "Documents": [
+ {
+ "AbsoluteMoniker": "D:0:0:{36A44E1B-CB62-446B-86E4-AA211A1C4DFD}|ConsoleApp1\\ConsoleApp1.csproj|c:\\users\\szabomarton\\desktop\\c#\\progaora\\20240919\\consoleapp1\\consoleapp1\\program.cs||{A6C744A8-0E4A-4FC6-886A-064283054674}",
+ "RelativeMoniker": "D:0:0:{36A44E1B-CB62-446B-86E4-AA211A1C4DFD}|ConsoleApp1\\ConsoleApp1.csproj|solutionrelative:consoleapp1\\program.cs||{A6C744A8-0E4A-4FC6-886A-064283054674}"
+ }
+ ],
+ "DocumentGroupContainers": [
+ {
+ "Orientation": 0,
+ "VerticalTabListWidth": 256,
+ "DocumentGroups": [
+ {
+ "DockedWidth": 200,
+ "SelectedChildIndex": 0,
+ "Children": [
+ {
+ "$type": "Document",
+ "DocumentIndex": 0,
+ "Title": "Program.cs",
+ "DocumentMoniker": "C:\\Users\\szabomarton\\Desktop\\C#\\ProgaOra\\20240919\\ConsoleApp1\\ConsoleApp1\\Program.cs",
+ "RelativeDocumentMoniker": "ConsoleApp1\\Program.cs",
+ "ToolTip": "C:\\Users\\szabomarton\\Desktop\\C#\\ProgaOra\\20240919\\ConsoleApp1\\ConsoleApp1\\Program.cs",
+ "RelativeToolTip": "ConsoleApp1\\Program.cs",
+ "ViewState": "AgIAADEAAAAAAAAAAAAcwEEAAAAoAAAAAAAAAA==",
+ "Icon": "ae27a6b0-e345-4288-96df-5eaf394ee369.000738|",
+ "WhenOpened": "2024-09-19T06:52:49.159Z",
+ "EditorCaption": ""
+ }
+ ]
+ }
+ ]
+ }
+ ]
+}
\ No newline at end of file
diff --git a/20240919/ConsoleApp1/.vs/ConsoleApp1/v17/DocumentLayout.json b/20240919/ConsoleApp1/.vs/ConsoleApp1/v17/DocumentLayout.json
new file mode 100644
index 0000000..ad977d0
--- /dev/null
+++ b/20240919/ConsoleApp1/.vs/ConsoleApp1/v17/DocumentLayout.json
@@ -0,0 +1,37 @@
+{
+ "Version": 1,
+ "WorkspaceRootPath": "C:\\Users\\szabomarton\\Desktop\\C#\\ProgaOra\\20240919\\ConsoleApp1\\",
+ "Documents": [
+ {
+ "AbsoluteMoniker": "D:0:0:{36A44E1B-CB62-446B-86E4-AA211A1C4DFD}|ConsoleApp1\\ConsoleApp1.csproj|c:\\users\\szabomarton\\desktop\\c#\\progaora\\20240919\\consoleapp1\\consoleapp1\\program.cs||{A6C744A8-0E4A-4FC6-886A-064283054674}",
+ "RelativeMoniker": "D:0:0:{36A44E1B-CB62-446B-86E4-AA211A1C4DFD}|ConsoleApp1\\ConsoleApp1.csproj|solutionrelative:consoleapp1\\program.cs||{A6C744A8-0E4A-4FC6-886A-064283054674}"
+ }
+ ],
+ "DocumentGroupContainers": [
+ {
+ "Orientation": 0,
+ "VerticalTabListWidth": 256,
+ "DocumentGroups": [
+ {
+ "DockedWidth": 200,
+ "SelectedChildIndex": 0,
+ "Children": [
+ {
+ "$type": "Document",
+ "DocumentIndex": 0,
+ "Title": "Program.cs",
+ "DocumentMoniker": "C:\\Users\\szabomarton\\Desktop\\C#\\ProgaOra\\20240919\\ConsoleApp1\\ConsoleApp1\\Program.cs",
+ "RelativeDocumentMoniker": "ConsoleApp1\\Program.cs",
+ "ToolTip": "C:\\Users\\szabomarton\\Desktop\\C#\\ProgaOra\\20240919\\ConsoleApp1\\ConsoleApp1\\Program.cs",
+ "RelativeToolTip": "ConsoleApp1\\Program.cs",
+ "ViewState": "AgIAADEAAAAAAAAAAAAcwEMAAAAAAAAAAAAAAA==",
+ "Icon": "ae27a6b0-e345-4288-96df-5eaf394ee369.000738|",
+ "WhenOpened": "2024-09-19T06:52:49.159Z",
+ "EditorCaption": ""
+ }
+ ]
+ }
+ ]
+ }
+ ]
+}
\ No newline at end of file
diff --git a/20240919/ConsoleApp1/ConsoleApp1.sln b/20240919/ConsoleApp1/ConsoleApp1.sln
new file mode 100644
index 0000000..30b248b
--- /dev/null
+++ b/20240919/ConsoleApp1/ConsoleApp1.sln
@@ -0,0 +1,25 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.11.35222.181
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ConsoleApp1", "ConsoleApp1\ConsoleApp1.csproj", "{36A44E1B-CB62-446B-86E4-AA211A1C4DFD}"
+EndProject
+Global
+ GlobalSection(SolutionConfigurationPlatforms) = preSolution
+ Debug|Any CPU = Debug|Any CPU
+ Release|Any CPU = Release|Any CPU
+ EndGlobalSection
+ GlobalSection(ProjectConfigurationPlatforms) = postSolution
+ {36A44E1B-CB62-446B-86E4-AA211A1C4DFD}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+ {36A44E1B-CB62-446B-86E4-AA211A1C4DFD}.Debug|Any CPU.Build.0 = Debug|Any CPU
+ {36A44E1B-CB62-446B-86E4-AA211A1C4DFD}.Release|Any CPU.ActiveCfg = Release|Any CPU
+ {36A44E1B-CB62-446B-86E4-AA211A1C4DFD}.Release|Any CPU.Build.0 = Release|Any CPU
+ EndGlobalSection
+ GlobalSection(SolutionProperties) = preSolution
+ HideSolutionNode = FALSE
+ EndGlobalSection
+ GlobalSection(ExtensibilityGlobals) = postSolution
+ SolutionGuid = {AEBD4DC6-C386-4383-A868-204B9E548812}
+ EndGlobalSection
+EndGlobal
diff --git a/20240919/ConsoleApp1/ConsoleApp1/App.config b/20240919/ConsoleApp1/ConsoleApp1/App.config
new file mode 100644
index 0000000..56efbc7
--- /dev/null
+++ b/20240919/ConsoleApp1/ConsoleApp1/App.config
@@ -0,0 +1,6 @@
+
+
+
+
+
+
\ No newline at end of file
diff --git a/20240919/ConsoleApp1/ConsoleApp1/ConsoleApp1.csproj b/20240919/ConsoleApp1/ConsoleApp1/ConsoleApp1.csproj
new file mode 100644
index 0000000..57bf964
--- /dev/null
+++ b/20240919/ConsoleApp1/ConsoleApp1/ConsoleApp1.csproj
@@ -0,0 +1,53 @@
+
+
+
+
+ Debug
+ AnyCPU
+ {36A44E1B-CB62-446B-86E4-AA211A1C4DFD}
+ Exe
+ ConsoleApp1
+ ConsoleApp1
+ v4.7.2
+ 512
+ true
+ true
+
+
+ AnyCPU
+ true
+ full
+ false
+ bin\Debug\
+ DEBUG;TRACE
+ prompt
+ 4
+
+
+ AnyCPU
+ pdbonly
+ true
+ bin\Release\
+ TRACE
+ prompt
+ 4
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/20240919/ConsoleApp1/ConsoleApp1/Program.cs b/20240919/ConsoleApp1/ConsoleApp1/Program.cs
new file mode 100644
index 0000000..fe55c9c
--- /dev/null
+++ b/20240919/ConsoleApp1/ConsoleApp1/Program.cs
@@ -0,0 +1,131 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.IO;
+using System.Diagnostics.Tracing;
+using System.Diagnostics.Contracts;
+using System.Runtime.CompilerServices;
+
+namespace ConsoleApp1
+{
+ internal class Program
+ {
+ static void Main(string[] args)
+ {
+ DataRead("C:\\Users\\szabomarton\\Desktop\\C#\\ProgaOra\\20240919\\termekek.csv", ';');
+ //Feladat1();
+ Feladat2();
+ Feladat3();
+ Feladat4();
+
+ Console.ReadLine();
+ }
+
+ static void Feladat1()
+ {
+ int fizetes_sum = Fizetes_SUM(Data.alkalmazottak);
+ double fizetes_avg = Fizetes_AVG(Data.alkalmazottak);
+ Console.WriteLine($"A fizetések összege: {fizetes_sum}");
+ Console.WriteLine($"A fizetések Átlaga: {fizetes_avg:F2}");
+ }
+
+ static int Fizetes_SUM(List T) {
+ var result = T.Select(x => x.fizetes);
+ return result.Sum();
+ }
+
+ static double Fizetes_AVG(List T)
+ {
+ IEnumerable asd = T.Select(x => x.fizetes);
+ return asd.Average();
+ }
+
+ static void Feladat2()
+ {
+ foreach (var item in Data.raktar)
+ {
+ Console.WriteLine($"{item.nev}");
+ }
+ }
+
+ static void Feladat3()
+ {
+ var result = Data.raktar.GroupBy(y => y.kategoria).Select(x => new {x.Key, darab = x.Count()});
+ foreach (var item in result)
+ {
+ Console.WriteLine($"{item.Key} {item.darab}");
+ }
+
+ }
+
+ static void Feladat4()
+ {
+ var legolcsobb = Data.raktar.OrderBy(x => x.ar).Select(y => new {y.nev, y.ar});
+ Console.WriteLine(legolcsobb);
+ }
+
+
+ static void DataRead(string path, char splitchar)
+ {
+ using (StreamReader streamReader = new StreamReader(path))
+ {
+ string line = streamReader.ReadLine();
+ line = streamReader.ReadLine();
+ while (line != null)
+ {
+ string[] datas = line.Split(splitchar);
+
+ TermekAdd(datas);
+
+ line = streamReader.ReadLine();
+ }
+ }
+ }
+
+ static void TermekAdd(string[] datas)
+ {
+ Termek termek = new Termek(datas[0], datas[1], Int32.Parse(datas[2]));
+ Data.raktar.Add(termek);
+ }
+
+ static void AlkalmazottAdd(string[] datas)
+ {
+ Alkalmazott alkalmazott = new Alkalmazott(datas[0], Int32.Parse(datas[1]));
+ Data.alkalmazottak.Add(alkalmazott);
+ }
+ }
+
+ public class Alkalmazott
+ {
+ public string nev;
+ public int fizetes;
+
+ public Alkalmazott(string Nev, int Fizetes)
+ {
+ nev = Nev;
+ fizetes = Fizetes;
+ }
+ }
+
+ public class Termek
+ {
+ public string nev;
+ public string kategoria;
+ public int ar;
+
+ public Termek(string Nev, string Kategoria, int Ar)
+ {
+ nev = Nev;
+ kategoria = Kategoria;
+ ar = Ar;
+ }
+ }
+
+ public static class Data
+ {
+ public static List alkalmazottak = new List ();
+ public static List raktar = new List ();
+ }
+}
diff --git a/20240919/ConsoleApp1/ConsoleApp1/Properties/AssemblyInfo.cs b/20240919/ConsoleApp1/ConsoleApp1/Properties/AssemblyInfo.cs
new file mode 100644
index 0000000..a699f02
--- /dev/null
+++ b/20240919/ConsoleApp1/ConsoleApp1/Properties/AssemblyInfo.cs
@@ -0,0 +1,33 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// General Information about an assembly is controlled through the following
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("ConsoleApp1")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("ConsoleApp1")]
+[assembly: AssemblyCopyright("Copyright © 2024")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Setting ComVisible to false makes the types in this assembly not visible
+// to COM components. If you need to access a type in this assembly from
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible(false)]
+
+// The following GUID is for the ID of the typelib if this project is exposed to COM
+[assembly: Guid("36a44e1b-cb62-446b-86e4-aa211a1c4dfd")]
+
+// Version information for an assembly consists of the following four values:
+//
+// Major Version
+// Minor Version
+// Build Number
+// Revision
+//
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]
diff --git a/20240919/ConsoleApp1/ConsoleApp1/bin/Debug/ConsoleApp1.exe b/20240919/ConsoleApp1/ConsoleApp1/bin/Debug/ConsoleApp1.exe
new file mode 100644
index 0000000..35bb8ba
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diff --git a/20240919/ConsoleApp1/ConsoleApp1/bin/Debug/ConsoleApp1.exe.config b/20240919/ConsoleApp1/ConsoleApp1/bin/Debug/ConsoleApp1.exe.config
new file mode 100644
index 0000000..56efbc7
--- /dev/null
+++ b/20240919/ConsoleApp1/ConsoleApp1/bin/Debug/ConsoleApp1.exe.config
@@ -0,0 +1,6 @@
+
+
+
+
+
+
\ No newline at end of file
diff --git a/20240919/ConsoleApp1/ConsoleApp1/bin/Debug/ConsoleApp1.pdb b/20240919/ConsoleApp1/ConsoleApp1/bin/Debug/ConsoleApp1.pdb
new file mode 100644
index 0000000..874dca3
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diff --git a/20240919/ConsoleApp1/ConsoleApp1/obj/Debug/.NETFramework,Version=v4.7.2.AssemblyAttributes.cs b/20240919/ConsoleApp1/ConsoleApp1/obj/Debug/.NETFramework,Version=v4.7.2.AssemblyAttributes.cs
new file mode 100644
index 0000000..3871b18
--- /dev/null
+++ b/20240919/ConsoleApp1/ConsoleApp1/obj/Debug/.NETFramework,Version=v4.7.2.AssemblyAttributes.cs
@@ -0,0 +1,4 @@
+//
+using System;
+using System.Reflection;
+[assembly: global::System.Runtime.Versioning.TargetFrameworkAttribute(".NETFramework,Version=v4.7.2", FrameworkDisplayName = ".NET Framework 4.7.2")]
diff --git a/20240919/ConsoleApp1/ConsoleApp1/obj/Debug/ConsoleApp1.csproj.AssemblyReference.cache b/20240919/ConsoleApp1/ConsoleApp1/obj/Debug/ConsoleApp1.csproj.AssemblyReference.cache
new file mode 100644
index 0000000..126ed02
Binary files /dev/null and b/20240919/ConsoleApp1/ConsoleApp1/obj/Debug/ConsoleApp1.csproj.AssemblyReference.cache differ
diff --git a/20240919/ConsoleApp1/ConsoleApp1/obj/Debug/ConsoleApp1.csproj.CoreCompileInputs.cache b/20240919/ConsoleApp1/ConsoleApp1/obj/Debug/ConsoleApp1.csproj.CoreCompileInputs.cache
new file mode 100644
index 0000000..0be8d26
--- /dev/null
+++ b/20240919/ConsoleApp1/ConsoleApp1/obj/Debug/ConsoleApp1.csproj.CoreCompileInputs.cache
@@ -0,0 +1 @@
+137ddb1975586287657f37337b64d051167bb6a147915d9fb5b8eb94b1093509
diff --git a/20240919/ConsoleApp1/ConsoleApp1/obj/Debug/ConsoleApp1.csproj.FileListAbsolute.txt b/20240919/ConsoleApp1/ConsoleApp1/obj/Debug/ConsoleApp1.csproj.FileListAbsolute.txt
new file mode 100644
index 0000000..aabaa8f
--- /dev/null
+++ b/20240919/ConsoleApp1/ConsoleApp1/obj/Debug/ConsoleApp1.csproj.FileListAbsolute.txt
@@ -0,0 +1,7 @@
+C:\Users\szabomarton\Desktop\C#\ProgaOra\20240919\ConsoleApp1\ConsoleApp1\bin\Debug\ConsoleApp1.exe.config
+C:\Users\szabomarton\Desktop\C#\ProgaOra\20240919\ConsoleApp1\ConsoleApp1\bin\Debug\ConsoleApp1.exe
+C:\Users\szabomarton\Desktop\C#\ProgaOra\20240919\ConsoleApp1\ConsoleApp1\bin\Debug\ConsoleApp1.pdb
+C:\Users\szabomarton\Desktop\C#\ProgaOra\20240919\ConsoleApp1\ConsoleApp1\obj\Debug\ConsoleApp1.csproj.AssemblyReference.cache
+C:\Users\szabomarton\Desktop\C#\ProgaOra\20240919\ConsoleApp1\ConsoleApp1\obj\Debug\ConsoleApp1.csproj.CoreCompileInputs.cache
+C:\Users\szabomarton\Desktop\C#\ProgaOra\20240919\ConsoleApp1\ConsoleApp1\obj\Debug\ConsoleApp1.exe
+C:\Users\szabomarton\Desktop\C#\ProgaOra\20240919\ConsoleApp1\ConsoleApp1\obj\Debug\ConsoleApp1.pdb
diff --git a/20240919/ConsoleApp1/ConsoleApp1/obj/Debug/ConsoleApp1.exe b/20240919/ConsoleApp1/ConsoleApp1/obj/Debug/ConsoleApp1.exe
new file mode 100644
index 0000000..35bb8ba
Binary files /dev/null and b/20240919/ConsoleApp1/ConsoleApp1/obj/Debug/ConsoleApp1.exe differ
diff --git a/20240919/ConsoleApp1/ConsoleApp1/obj/Debug/ConsoleApp1.pdb b/20240919/ConsoleApp1/ConsoleApp1/obj/Debug/ConsoleApp1.pdb
new file mode 100644
index 0000000..874dca3
Binary files /dev/null and b/20240919/ConsoleApp1/ConsoleApp1/obj/Debug/ConsoleApp1.pdb differ
diff --git a/20240919/ConsoleApp1/ConsoleApp1/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache b/20240919/ConsoleApp1/ConsoleApp1/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache
new file mode 100644
index 0000000..04064f3
Binary files /dev/null and b/20240919/ConsoleApp1/ConsoleApp1/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache differ
diff --git a/20240919/alkalmazottak.txt b/20240919/alkalmazottak.txt
new file mode 100644
index 0000000..a0a77dd
--- /dev/null
+++ b/20240919/alkalmazottak.txt
@@ -0,0 +1,18 @@
+Név,Fizetés
+Kiss Péter,300000
+Nagy László,400000
+Szabó Erika,350000
+Tóth Gábor,500000
+Molnár András,280000
+Varga Judit,450000
+Farkas Béla,370000
+Balogh Ágnes,330000
+Kovács Dóra,380000
+Boros Anikó,410000
+Lukács Gábor,430000
+Horváth István,295000
+Vörös Anna,310000
+Veres Katalin,470000
+Fekete Csaba,440000
+Fehér Levente,360000
+Simon László,300000
diff --git a/20240919/termekek.csv b/20240919/termekek.csv
new file mode 100644
index 0000000..403cd2d
--- /dev/null
+++ b/20240919/termekek.csv
@@ -0,0 +1,18 @@
+Név;Kategória;Ár
+Laptop;Elektronikai eszközök;900000
+Egér;Elektronikai eszközök;2000
+Szék;Bútorok;50000
+Asztal;Bútorok;150000
+Ceruza;Irodai eszközök;200
+Nyomtató;Elektronikai eszközök;30000
+Toll;Irodai eszközök;300
+Polc;Bútorok;10000
+Lámpa;Bútorok;7000
+Hűtőszekrény;Elektronikai eszközök;120000
+Tűzőgép;Irodai eszközök;800
+Számítógép;Elektronikai eszközök;150000
+Fotel;Bútorok;20000
+Papír;Irodai eszközök;100
+Tányér;Konyhai eszközök;5000
+Bögre;Konyhai eszközök;600
+Serpenyő;Konyhai eszközök;4000
diff --git a/linq_anyag b/linq_anyag
index aabb913..fcef298 100644
--- a/linq_anyag
+++ b/linq_anyag
@@ -50,4 +50,58 @@ Elemek kiválasztása:
ElementAt(index)
ElementAtOrDefault(index)
-
\ No newline at end of file
+
+Ismétlődések kiszűrése
+ Ismétlődés kiszűrésére a Distinct metódus alkalmazható.
+ Alkalmazásának feltétele, hogy ha a típusunk egy összetett típus, ami több elemet tartalmaz, akkor rendelkezzen egy megfelelően felülírt Equals metódussal.
+ Alternatívként adhatunk meg egy IEqualityComparer interface metódus-t megvalósító típus példányt.
+
+ var egyedix = elemek.DistinctBy(i => i.x);
+
+Aggregáló műveletek
+ Ha kollekció eredményének számosságára vagyunk kíváncsiak, akkor a Count() metódus alkalmazhatjuk.
+ var parosx = elemek.Count(i => i.X%2 ==0);
+
+Feltételek esetén, ha azt szeretnénk kiértékelni, hogy egyáltalán van e eredménye a keresésnek, akkor a Cpunt() > 0 kifejezés erősen kerülendő, mert ez végig megy a kollekción és végigszámolja az elemeket.
+Helyette az Any() metódust használjuk, ami eleve erre lett kitalálva.
+Az Any() igaz értéket ad vissza, ha az IEnumerable típisusnk tartalmaz elemeket.
+Paraméterrel is kiegészíthetjük.
+Ebben az esetben azt mondja meg, hogy a kollekció tartalmaz-e a feltételnek megfelelő elemet.
+
+Ha egy kollekció esetén minimum vagy maximum értékre vagyunk kíváncsiak, akkor a Min() és Max() metódusokat alkalmazhatjuk.
+Ha a kollekció szám típusokból áll, akkor paraméter nem kell adnunk.
+Ellenkező esetben kell egy kifejezés, ami megmondja, hogy mi alapján számolódjon meg a min és max érték.
+Átlagosra hasonló működéssel az Avg() metódus alkalmazható.
+
+var MaxX = elemek.Max( i => i.X);
+
+var MinY = elemek.Min( i => i.Y);
+
+vor avg = elemek.Avg( i => i.Y * i.X);
+
+int[] ints1 = {5,56,535434,435473854,45};
+int[] ints2 = {58,56448,38647,4,45,5,6,56};
+
+//unió
+IEnumerable union = ints1.Union(ints2);
+
+//metszet
+IEnumerable intersect = ints1.Intersect(ints2);
+
+// különbség
+IEnumerable except = ints1.Except(ints2);
+
+//Concat
+var concatenated = ints1.Concat(ints2);
+
+Ha olyan módon szeretnénk összefűzni elemeket, hogy 1 elemet szeretnénk venni az első kollekcióóból, majd egy elemet szeretnénk a második kollekcióból.
+Erre a zip művelet képes
+ami a ValueTuple formában adja vissza az elemeket.
+
+var result = a.zip(b);
+
+szeletelés
+Chunk műveletet, amivel egy IEnumerable típust fel tudunk szeletelni több, megadott maximum elemszámú T típusú tömbre.
+int[] a = {1,2,3,4};
+IEnumerable result = a.chunk(2);
+//[1,2] és [3,4] tömböket produkál