started c# pow implementation

pow-csharp/onionrpow-cli/Program.cs

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+using System;
+using System.Text;
+
+using onionrpow;
+
+namespace onionrpow_cli
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            Console.WriteLine("Hello World!");
+            onionrpow.OnionrPow.compute(Encoding.UTF8.GetBytes("test"), 4);
+        }
+    }
+}

pow-csharp/onionrpow-cli/onionrpow-cli.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <ItemGroup>
+    <ProjectReference Include="..\onionrpow\onionrpow.csproj" />
+  </ItemGroup>
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <RootNamespace>onionrpow_cli</RootNamespace>
+  </PropertyGroup>
+
+</Project>