添加项目文件。

CardCodeSearcher.sln

+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.0.32112.339
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "CardCodeSearcher", "CardCodeSearcher\CardCodeSearcher.csproj", "{98B2D9D2-FBE2-4E56-BB6E-9C0180726995}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{98B2D9D2-FBE2-4E56-BB6E-9C0180726995}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{98B2D9D2-FBE2-4E56-BB6E-9C0180726995}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{98B2D9D2-FBE2-4E56-BB6E-9C0180726995}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{98B2D9D2-FBE2-4E56-BB6E-9C0180726995}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {948ED233-C0D9-4D5E-A5F4-D574891F1A78}
+	EndGlobalSection
+EndGlobal

CardCodeSearcher/CardCodeSearcher.csproj

+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>