diff --git a/Convention-CSharp.csproj b/Convention-CSharp.csproj
new file mode 100644
index 0000000..14d63da
--- /dev/null
+++ b/Convention-CSharp.csproj
@@ -0,0 +1,11 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <RootNamespace>Convention</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>
diff --git a/Convention-CSharp.sln b/Convention-CSharp.sln
new file mode 100644
index 0000000..1417e34
--- /dev/null
+++ b/Convention-CSharp.sln
@@ -0,0 +1,25 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.9.34728.123
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Convention-CSharp", "Convention-CSharp.csproj", "{753E942E-7F20-44F1-8120-05B81F869EA5}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{753E942E-7F20-44F1-8120-05B81F869EA5}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{753E942E-7F20-44F1-8120-05B81F869EA5}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{753E942E-7F20-44F1-8120-05B81F869EA5}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{753E942E-7F20-44F1-8120-05B81F869EA5}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {58B645F4-3C17-449A-838D-B6C78BA4DCD1}
+	EndGlobalSection
+EndGlobal
diff --git a/Convention/Runtime/Config.cs b/Convention/Runtime/Config.cs
new file mode 100644
index 0000000..5f72ee9
--- /dev/null
+++ b/Convention/Runtime/Config.cs
@@ -0,0 +1,39 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Convention
+{
+    namespace SAL
+    {
+        public interface IHasCheckMethod
+        {
+            bool Check();
+        }
+
+        public class ReturnValue { }
+
+        public enum ComparedFlag
+        {
+            Greater, Less, Equal, GreaterOrEqual, LessOrEqual, NotEqual
+        }
+
+        [System.AttributeUsage(AttributeTargets.ReturnValue, Inherited = true, AllowMultiple = true)]
+        public sealed class SuccessAttribute : Attribute, IHasCheckMethod
+        {
+            private List<object> exprs = new();
+
+            public bool Check()
+            {
+                throw new NotImplementedException();
+            }
+        }
+
+    }
+
+    public static class PlatformIndictaor
+    {
+    }
+}
diff --git a/[Test]/Program.cs b/[Test]/Program.cs
new file mode 100644
index 0000000..3849a54
--- /dev/null
+++ b/[Test]/Program.cs
@@ -0,0 +1,9 @@
+using Convention;
+
+public class Program
+{
+    static void Main(string[] args)
+    {
+        Console.WriteLine("Hello, World!");
+    }
+}
\ No newline at end of file