refactor!: remove support for .NET 7 (#1202)

Remove support for .NET 7 as Microsoft support [ended on May 14, 2024](https://dotnet.microsoft.com/en-us/platform/support/policy/dotnet-core). The supported frameworks still are:
- (net462)
- netstandard2.0
- netstandard2.1
- net6.0
- net8.0
- net9.0

Author: vbreuss

Directory.Build.props

@@ -11,9 +11,9 @@
     <PackageLicenseExpression>MIT</PackageLicenseExpression>
     <PackageReadmeFile>README.md</PackageReadmeFile>
     <DefineConstants Condition="'$(TargetFramework)' != 'net462'">$(DefineConstants);FEATURE_FILE_SYSTEM_ACL_EXTENSIONS</DefineConstants>
-    <DefineConstants Condition="'$(TargetFramework)' == 'net9.0' OR '$(TargetFramework)' == 'net8.0' OR '$(TargetFramework)' == 'net7.0' OR '$(TargetFramework)' == 'net6.0' OR '$(TargetFramework)' == 'netstandard2.1'">$(DefineConstants);FEATURE_ASYNC_FILE;FEATURE_ENUMERATION_OPTIONS;FEATURE_ADVANCED_PATH_OPERATIONS;FEATURE_PATH_JOIN_WITH_SPAN;FEATURE_SPAN</DefineConstants>
-    <DefineConstants Condition="'$(TargetFramework)' == 'net9.0' OR '$(TargetFramework)' == 'net8.0' OR '$(TargetFramework)' == 'net7.0' OR '$(TargetFramework)' == 'net6.0'">$(DefineConstants);FEATURE_FILE_MOVE_WITH_OVERWRITE;FEATURE_SUPPORTED_OS_ATTRIBUTE;FEATURE_FILE_SYSTEM_WATCHER_FILTERS;FEATURE_ENDS_IN_DIRECTORY_SEPARATOR;FEATURE_PATH_JOIN_WITH_PARAMS;FEATURE_PATH_JOIN_WITH_FOUR_PATHS;FEATURE_FILE_SYSTEM_INFO_LINK_TARGET;FEATURE_CREATE_SYMBOLIC_LINK;FEATURE_FILESTREAM_OPTIONS</DefineConstants>
-    <DefineConstants Condition="'$(TargetFramework)' == 'net9.0' OR '$(TargetFramework)' == 'net8.0' OR '$(TargetFramework)' == 'net7.0'">$(DefineConstants);FEATURE_PATH_EXISTS;FEATURE_FILE_SYSTEM_WATCHER_WAIT_WITH_TIMESPAN;FEATURE_FILE_ATTRIBUTES_VIA_HANDLE;FEATURE_CREATE_TEMP_SUBDIRECTORY;FEATURE_READ_LINES_ASYNC;FEATURE_UNIX_FILE_MODE</DefineConstants>
+    <DefineConstants Condition="'$(TargetFramework)' == 'net9.0' OR '$(TargetFramework)' == 'net8.0' OR '$(TargetFramework)' == 'net6.0' OR '$(TargetFramework)' == 'netstandard2.1'">$(DefineConstants);FEATURE_ASYNC_FILE;FEATURE_ENUMERATION_OPTIONS;FEATURE_ADVANCED_PATH_OPERATIONS;FEATURE_PATH_JOIN_WITH_SPAN;FEATURE_SPAN</DefineConstants>
+    <DefineConstants Condition="'$(TargetFramework)' == 'net9.0' OR '$(TargetFramework)' == 'net8.0' OR '$(TargetFramework)' == 'net6.0'">$(DefineConstants);FEATURE_FILE_MOVE_WITH_OVERWRITE;FEATURE_SUPPORTED_OS_ATTRIBUTE;FEATURE_FILE_SYSTEM_WATCHER_FILTERS;FEATURE_ENDS_IN_DIRECTORY_SEPARATOR;FEATURE_PATH_JOIN_WITH_PARAMS;FEATURE_PATH_JOIN_WITH_FOUR_PATHS;FEATURE_FILE_SYSTEM_INFO_LINK_TARGET;FEATURE_CREATE_SYMBOLIC_LINK;FEATURE_FILESTREAM_OPTIONS</DefineConstants>
+    <DefineConstants Condition="'$(TargetFramework)' == 'net9.0' OR '$(TargetFramework)' == 'net8.0'">$(DefineConstants);FEATURE_PATH_EXISTS;FEATURE_FILE_SYSTEM_WATCHER_WAIT_WITH_TIMESPAN;FEATURE_FILE_ATTRIBUTES_VIA_HANDLE;FEATURE_CREATE_TEMP_SUBDIRECTORY;FEATURE_READ_LINES_ASYNC;FEATURE_UNIX_FILE_MODE</DefineConstants>
     <DefineConstants Condition="'$(TargetFramework)' == 'net9.0'">$(DefineConstants);FEATURE_PATH_SPAN;FEATURE_FILE_SPAN</DefineConstants>
     <DefineConstants>$(DefineConstants);FEATURE_SERIALIZABLE</DefineConstants>
   </PropertyGroup>

src/System.IO.Abstractions.TestingHelpers/System.IO.Abstractions.TestingHelpers.csproj

@@ -3,7 +3,7 @@
       <AssemblyName>System.IO.Abstractions.TestingHelpers</AssemblyName>
       <RootNamespace>System.IO.Abstractions.TestingHelpers</RootNamespace>
       <Description>A set of pre-built mocks to help when testing file system interactions.</Description>
-      <TargetFrameworks>net9.0;net8.0;net7.0;net6.0;netstandard2.1;netstandard2.0;net462</TargetFrameworks>
+      <TargetFrameworks>net9.0;net8.0;net6.0;netstandard2.1;netstandard2.0;net462</TargetFrameworks>
       <PackageIcon>icon_256x256.png</PackageIcon>
   </PropertyGroup>
   <ItemGroup>

src/System.IO.Abstractions/System.IO.Abstractions.csproj

@@ -3,7 +3,7 @@
     <AssemblyName>System.IO.Abstractions</AssemblyName>
     <RootNamespace>System.IO.Abstractions</RootNamespace>
     <Description>A set of abstractions to help make file system interactions testable.</Description>
-    <TargetFrameworks>net8.0;net7.0;net6.0;netstandard2.1;netstandard2.0;net462</TargetFrameworks>
+    <TargetFrameworks>net8.0;net6.0;netstandard2.1;netstandard2.0;net462</TargetFrameworks>
     <PackageIcon>icon_256x256.png</PackageIcon>
   </PropertyGroup>
   <ItemGroup>

src/TestableIO.System.IO.Abstractions.TestingHelpers/TestableIO.System.IO.Abstractions.TestingHelpers.csproj

@@ -3,7 +3,7 @@
         <AssemblyName>TestableIO.System.IO.Abstractions.TestingHelpers</AssemblyName>
         <RootNamespace>System.IO.Abstractions.TestingHelpers</RootNamespace>
         <Description>A set of pre-built mocks to help when testing file system interactions.</Description>
-        <TargetFrameworks>net9.0;net8.0;net7.0;net6.0;netstandard2.1;netstandard2.0;net462</TargetFrameworks>
+        <TargetFrameworks>net9.0;net8.0;net6.0;netstandard2.1;netstandard2.0;net462</TargetFrameworks>
         <PackageIcon>icon_256x256.png</PackageIcon>
     </PropertyGroup>
     <ItemGroup>

src/TestableIO.System.IO.Abstractions.Wrappers/TestableIO.System.IO.Abstractions.Wrappers.csproj

@@ -3,7 +3,7 @@
     <AssemblyName>TestableIO.System.IO.Abstractions.Wrappers</AssemblyName>
     <RootNamespace>System.IO.Abstractions</RootNamespace>
     <Description>A set of abstractions to help make file system interactions testable.</Description>
-    <TargetFrameworks>net9.0;net8.0;net7.0;net6.0;netstandard2.1;netstandard2.0;net462</TargetFrameworks>
+    <TargetFrameworks>net9.0;net8.0;net6.0;netstandard2.1;netstandard2.0;net462</TargetFrameworks>
     <PackageIcon>icon_256x256.png</PackageIcon>
   </PropertyGroup>
   <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.1' OR '$(TargetFramework)' == 'netstandard2.0'">

src/TestableIO.System.IO.Abstractions/TestableIO.System.IO.Abstractions.csproj

@@ -3,7 +3,7 @@
     <AssemblyName>TestableIO.System.IO.Abstractions</AssemblyName>
     <RootNamespace>System.IO.Abstractions</RootNamespace>
     <Description>A set of abstractions to help make file system interactions testable.</Description>
-    <TargetFrameworks>net9.0;net8.0;net7.0;net6.0;netstandard2.1;netstandard2.0;net462</TargetFrameworks>
+    <TargetFrameworks>net9.0;net8.0;net6.0;netstandard2.1;netstandard2.0;net462</TargetFrameworks>
     <PackageIcon>icon_256x256.png</PackageIcon>
     <Nullable>enable</Nullable>
     <LangVersion>preview</LangVersion>

tests/TestableIO.System.IO.Abstractions.TestingHelpers.Tests/TestableIO.System.IO.Abstractions.TestingHelpers.Tests.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net9.0;net8.0;net7.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net9.0;net8.0;net6.0</TargetFrameworks>
     <TargetFrameworks Condition="!$([MSBuild]::IsOsUnixLike())">$(TargetFrameworks);net462</TargetFrameworks>
     <Description>The unit tests for our pre-built mocks</Description>
     <AssemblyName>System.IO.Abstractions.TestingHelpers.Tests</AssemblyName>

tests/TestableIO.System.IO.Abstractions.Wrappers.Tests/ApiParityTests.cs

@@ -109,8 +109,6 @@ public ApiDiff(IEnumerable<string> extraMembers, IEnumerable<string> missingMemb
         private const string snapshotSuffix = ".NET Framework 4.6.2";
 #elif NET6_0
         private const string snapshotSuffix = ".NET 6.0";
-#elif NET7_0
-        private const string snapshotSuffix = ".NET 7.0";
 #elif NET8_0
         private const string snapshotSuffix = ".NET 8.0";
 #elif NET9_0

tests/TestableIO.System.IO.Abstractions.Wrappers.Tests/TestableIO.System.IO.Abstractions.Wrappers.Tests.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net9.0;net8.0;net7.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net9.0;net8.0;net6.0</TargetFrameworks>
     <TargetFrameworks Condition="!$([MSBuild]::IsOsUnixLike())">$(TargetFrameworks);net462</TargetFrameworks>
     <Description>The unit tests for our the core abstractions</Description>
     <AssemblyName>System.IO.Abstractions.Tests</AssemblyName>