添加项目文件。

111111111/111111111.csproj

@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net7.0</TargetFramework>
+    <RootNamespace>_111111111</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

111111111/Class1.cs

@@ -0,0 +1,7 @@
+namespace _111111111
+{
+    public class Class1
+    {
+
+    }
+}

ZT_FJK_1C.sln

@@ -0,0 +1,25 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.5.33530.505
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "111111111", "111111111\111111111.csproj", "{8F42F113-091F-4240-9025-BA7EB00D5B44}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{8F42F113-091F-4240-9025-BA7EB00D5B44}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{8F42F113-091F-4240-9025-BA7EB00D5B44}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{8F42F113-091F-4240-9025-BA7EB00D5B44}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{8F42F113-091F-4240-9025-BA7EB00D5B44}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {C75EF4BD-59B3-4F79-A380-6D452ADFB53E}
+	EndGlobalSection
+EndGlobal