Question How to set Editor Assemblies Compatibility Level in 2022 and below?

To my knowledge, this option was added in 2023.1 to the Configuration section within Project Settings.

Is it possible to mimic this in previous Unity versions using code easily, or has this been an internal feature not accessible till 2023.1?

I'm asking because my editor-specific csproj files are generated with facades instead of shims when .Netstandard is the chosen API Compatibility Level.

See the issue here.

 

I solved my issue.

#if !UNITY_2023_1_OR_NEWER
static string HandleEditorReference(string referencePath, string netstandardVersion)
{
var facadesPath = "UnityReferenceAssemblies\\unity-4.8-api\\Facades\\";
var referenceName = Path.GetFileNameWithoutExtension(referencePath);

return referenceName switch
{
"Microsoft.Win32.Primitives" or "System.AppContext" or "System.Collections.Concurrent" or
"System.Collections.NonGeneric" or "System.Collections.Specialized" or "System.ComponentModel" or
"System.ComponentModel.EventBasedAsync" or "System.Diagnostics.Contracts" or "System.Diagnostics.Debug" or
"System.Diagnostics.Tools" or "System.Diagnostics.Tracing" or "System.Globalization" or
"System.Globalization.Calendars" or "System.IO" or "System.IO.Compression" or
"System.IO.Compression.ZipFile" or "System.IO.FileSystem" or "System.IO.FileSystem.Primitives" or
"System.Linq" or "System.Linq.Expressions" or "System.Net.Http" or
"System.Net.Primitives" or "System.Net.Sockets" or "System.ObjectModel" or
"System.Reflection" or "System.Reflection.Extensions" or "System.Reflection.Primitives" or
"System.Resources.ResourceManager" or "System.Runtime" or "System.Runtime.Extensions" or
"System.Runtime.Handles" or "System.Runtime.InteropServices" or "System.Runtime.InteropServices.RuntimeInformation" or
"System.Runtime.Numerics" or "System.Security.Cryptography.Algorithms" or "System.Security.Cryptography.Encoding" or
"System.Security.Cryptography.Primitives" or "System.Security.Cryptography.X509Certificates" or "System.Text.Encoding" or
"System.Text.Encoding.Extensions" or "System.Text.RegularExpressions" or "System.Threading" or
"System.Threading.Tasks" or "System.Threading.Tasks.Parallel" or "System.Threading.Thread" or
"System.Threading.ThreadPool" or "System.Threading.Timer" or "System.ValueTuple" or
"System.Xml.ReaderWriter" or "System.Xml.XDocument" or "System.Xml.XmlDocument" or
"System.Xml.XmlSerializer" or "System.Xml.XPath" or "System.Xml.XPath.XDocument" =>
referencePath.Replace(facadesPath, $"NetStandard\\compat\\{netstandardVersion}\\shims\\netstandard\\"),
"System.Runtime.InteropServices.WindowsRuntime" => referencePath.Replace(facadesPath, $"NetStandard\\Extensions\\2.0.0\\"),
"netstandard" => referencePath.Replace(facadesPath, $"NetStandard\\{netstandardVersion}\\"),
_ => referencePath.Replace(facadesPath, $"NetStandard\\compat\\{netstandardVersion}\\shims\\"),
};
}
#endif