Proje dosyası ekle.

ClassMetotDemo.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.30804.86
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ClassMetotDemo", "ClassMetotDemo\ClassMetotDemo.csproj", "{8EF3A8A9-C936-4216-A1A4-2C1593FD2506}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{8EF3A8A9-C936-4216-A1A4-2C1593FD2506}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{8EF3A8A9-C936-4216-A1A4-2C1593FD2506}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{8EF3A8A9-C936-4216-A1A4-2C1593FD2506}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{8EF3A8A9-C936-4216-A1A4-2C1593FD2506}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {AE78AE78-08DD-4DA7-AE22-D730A107E3BE}
+	EndGlobalSection
+EndGlobal

ClassMetotDemo/ClassMetotDemo.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+  </PropertyGroup>
+
+</Project>

ClassMetotDemo/Musteri.cs

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+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace ClassMetotDemo
+{
+    class Musteri
+    {
+        public int Id { get; set; }
+        public string AdSoyad { get; set; }
+        public ulong TelefonNo { get; set; }
+        public string Adres { get; set; }
+    }
+
+}

ClassMetotDemo/MusteriManager.cs

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+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace ClassMetotDemo
+{
+    class MusteriManager
+    {
+        public void Ekle(Musteri musteri)
+        {
+
+            Console.WriteLine("Müşteri Eklendi:" + musteri.Id + " " + musteri.AdSoyad);
+
+        }
+
+        public void Sil(Musteri musteri)
+        {
+
+            Console.WriteLine(musteri.Id + " " + musteri.AdSoyad + " "+ "Kayıtlı Müsteri silindi.");
+
+        }
+
+
+    }
+}

ClassMetotDemo/Program.cs

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+using System;
+
+namespace ClassMetotDemo
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            Musteri musteri1 = new Musteri();
+            musteri1.Id = 3301;
+            musteri1.AdSoyad = "Hilal Taşkıran";
+            musteri1.TelefonNo = 05341234569;
+            musteri1.Adres = "Mersin";
+
+            Musteri musteri2 = new Musteri();
+            musteri2.Id = 3302;
+            musteri2.AdSoyad = "Şehmuz Kabadayı";
+            musteri2.TelefonNo = 05331234569;
+            musteri2.Adres = "Van";
+
+
+            Musteri[] musteriler = new Musteri[] { musteri1, musteri2 };
+
+            foreach (var musteri in musteriler )
+            {
+                Console.WriteLine(musteri.Id);
+                Console.WriteLine(musteri.AdSoyad);
+                Console.WriteLine(musteri.TelefonNo);
+                Console.WriteLine(musteri.Adres);
+                Console.WriteLine("***********************************");
+            }
+
+            MusteriManager musteriManager = new MusteriManager();
+            musteriManager.Ekle(musteri1);
+            musteriManager.Ekle(musteri2);
+            musteriManager.Sil(musteri2);
+
+
+
+
+        }
+    }
+}