diff --git a/oop/2018-09-15_parallel_programming/2018-09-15_parallel_programming.sln b/oop/2018-09-15_parallel_programming/2018-09-15_parallel_programming.sln
new file mode 100644
index 0000000..bd0325e
--- /dev/null
+++ b/oop/2018-09-15_parallel_programming/2018-09-15_parallel_programming.sln
@@ -0,0 +1,25 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 15
+VisualStudioVersion = 15.0.27703.2042
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "2018-09-15_parallel_programming", "2018-09-15_parallel_programming\2018-09-15_parallel_programming.csproj", "{C026DB21-31F8-46BC-B59A-85FC5E1A2242}"
+EndProject
+Global
+ GlobalSection(SolutionConfigurationPlatforms) = preSolution
+ Debug|Any CPU = Debug|Any CPU
+ Release|Any CPU = Release|Any CPU
+ EndGlobalSection
+ GlobalSection(ProjectConfigurationPlatforms) = postSolution
+ {C026DB21-31F8-46BC-B59A-85FC5E1A2242}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+ {C026DB21-31F8-46BC-B59A-85FC5E1A2242}.Debug|Any CPU.Build.0 = Debug|Any CPU
+ {C026DB21-31F8-46BC-B59A-85FC5E1A2242}.Release|Any CPU.ActiveCfg = Release|Any CPU
+ {C026DB21-31F8-46BC-B59A-85FC5E1A2242}.Release|Any CPU.Build.0 = Release|Any CPU
+ EndGlobalSection
+ GlobalSection(SolutionProperties) = preSolution
+ HideSolutionNode = FALSE
+ EndGlobalSection
+ GlobalSection(ExtensibilityGlobals) = postSolution
+ SolutionGuid = {E6A60DFF-828A-4F59-96E9-46C92571FB10}
+ EndGlobalSection
+EndGlobal
diff --git a/oop/2018-09-15_parallel_programming/2018-09-15_parallel_programming/2018-09-15_parallel_programming.csproj b/oop/2018-09-15_parallel_programming/2018-09-15_parallel_programming/2018-09-15_parallel_programming.csproj
new file mode 100644
index 0000000..ea80c6a
--- /dev/null
+++ b/oop/2018-09-15_parallel_programming/2018-09-15_parallel_programming/2018-09-15_parallel_programming.csproj
@@ -0,0 +1,52 @@
+
+
+
+
+ Debug
+ AnyCPU
+ {C026DB21-31F8-46BC-B59A-85FC5E1A2242}
+ Exe
+ _2018_09_15_parallel_programming
+ 2018-09-15_parallel_programming
+ v4.6.1
+ 512
+ 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/oop/2018-09-15_parallel_programming/2018-09-15_parallel_programming/App.config b/oop/2018-09-15_parallel_programming/2018-09-15_parallel_programming/App.config
new file mode 100644
index 0000000..731f6de
--- /dev/null
+++ b/oop/2018-09-15_parallel_programming/2018-09-15_parallel_programming/App.config
@@ -0,0 +1,6 @@
+
+
+
+
+
+
\ No newline at end of file
diff --git a/oop/2018-09-15_parallel_programming/2018-09-15_parallel_programming/Program.cs b/oop/2018-09-15_parallel_programming/2018-09-15_parallel_programming/Program.cs
new file mode 100644
index 0000000..bc8784b
--- /dev/null
+++ b/oop/2018-09-15_parallel_programming/2018-09-15_parallel_programming/Program.cs
@@ -0,0 +1,56 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace _2018_09_15_parallel_programming
+{
+ class Program
+ {
+ static void Main(string[] args)
+ {
+ var watch = System.Diagnostics.Stopwatch.StartNew();
+ Console.WriteLine("Serial Start");
+ SerialTest();
+ watch.Stop();
+ var serialelapsedMs = watch.ElapsedMilliseconds;
+ var serialelapsedTicks = watch.ElapsedTicks;
+ Console.WriteLine("Serial Stop");
+ Console.WriteLine("Elapse Time: " + serialelapsedMs.ToString());
+ Console.WriteLine("Elapsed Ticks: " + serialelapsedTicks.ToString());
+ watch.Reset();
+ Console.WriteLine("");
+ Console.WriteLine("");
+ Console.WriteLine("");
+ Console.WriteLine("Parallel Start");
+ watch.Start();
+ ParallelTest();
+ watch.Stop();
+ var elapsedMs = watch.ElapsedMilliseconds;
+ var elapsedTicks = watch.ElapsedTicks;
+ Console.WriteLine("Parallel Stop");
+ Console.WriteLine("Elapsed miliseconds: " + elapsedMs.ToString());
+ Console.WriteLine("Elapsed Ticks: " + elapsedTicks.ToString());
+ var factor = serialelapsedMs / elapsedMs;
+ Console.WriteLine("Parallel is " + factor.ToString() + " times faster.");
+ Console.ReadKey();
+ }
+ static void SerialTest()
+ {
+ double[] arr = new double[50000000];
+ for (int i = 0; i < 50000000; i++)
+ {
+ arr[i] = Math.Pow(i, 0.333) * Math.Sqrt(Math.Sin(i));
+ }
+ }
+ static void ParallelTest()
+ {
+ double[] arr = new double[50000000];
+ Parallel.For(0, 50000000, i =>
+ {
+ arr[i] = Math.Pow(i, 0.333) * Math.Sqrt(Math.Sin(i));
+ });
+ }
+ }
+}
diff --git a/oop/2018-09-15_parallel_programming/2018-09-15_parallel_programming/Properties/AssemblyInfo.cs b/oop/2018-09-15_parallel_programming/2018-09-15_parallel_programming/Properties/AssemblyInfo.cs
new file mode 100644
index 0000000..849404f
--- /dev/null
+++ b/oop/2018-09-15_parallel_programming/2018-09-15_parallel_programming/Properties/AssemblyInfo.cs
@@ -0,0 +1,36 @@
+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("2018-09-15_parallel_programming")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("2018-09-15_parallel_programming")]
+[assembly: AssemblyCopyright("Copyright © 2018")]
+[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("c026db21-31f8-46bc-b59a-85fc5e1a2242")]
+
+// Version information for an assembly consists of the following four values:
+//
+// Major Version
+// Minor Version
+// Build Number
+// Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]