diff --git a/ImGui.NET/ImGui.NET.Core.csproj b/ImGui.NET/ImGui.NET.Core.csproj
--- a/ImGui.NET/ImGui.NET.Core.csproj
+++ b/ImGui.NET/ImGui.NET.Core.csproj
@@ -21,7 +21,6 @@
     <DocumentationFile></DocumentationFile>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="System" />
     <PackageReference Include="System.Numerics.Vectors" Version="4.5.0" />
     <PackageReference Include="System.Runtime.CompilerServices.Unsafe" Version="5.0.0" />
     <PackageReference Include="System.Buffers" Version="4.5.1" />
diff --git a/SpriteFontPlus/src/obj/project.assets.json b/SpriteFontPlus/src/obj/project.assets.json
--- a/SpriteFontPlus/src/obj/project.assets.json
+++ b/SpriteFontPlus/src/obj/project.assets.json
@@ -2,8 +2,57 @@
   "version": 3,
   "targets": {
     ".NETFramework,Version=v4.5": {
+      "Microsoft.NETFramework.ReferenceAssemblies/1.0.2": {
+        "type": "package",
+        "dependencies": {
+          "Microsoft.NETFramework.ReferenceAssemblies.net45": "1.0.2"
+        }
+      },
+      "Microsoft.NETFramework.ReferenceAssemblies.net45/1.0.2": {
+        "type": "package",
+        "build": {
+          "build/Microsoft.NETFramework.ReferenceAssemblies.net45.targets": {}
+        }
+      },
       "FNA/1.0.0": {
         "type": "project",
+        "framework": ".NETFramework,Version=v4.0",
+        "compile": {
+          "bin/placeholder/FNA.dll": {}
+        },
+        "runtime": {
+          "bin/placeholder/FNA.dll": {}
+        }
+      }
+    },
+    ".NETStandard,Version=v2.0": {
+      "Microsoft.NETCore.Platforms/1.1.0": {
+        "type": "package",
+        "compile": {
+          "lib/netstandard1.0/_._": {}
+        },
+        "runtime": {
+          "lib/netstandard1.0/_._": {}
+        }
+      },
+      "NETStandard.Library/2.0.3": {
+        "type": "package",
+        "dependencies": {
+          "Microsoft.NETCore.Platforms": "1.1.0"
+        },
+        "compile": {
+          "lib/netstandard1.0/_._": {}
+        },
+        "runtime": {
+          "lib/netstandard1.0/_._": {}
+        },
+        "build": {
+          "build/netstandard2.0/NETStandard.Library.targets": {}
+        }
+      },
+      "FNA/1.0.0": {
+        "type": "project",
+        "framework": ".NETStandard,Version=v2.0",
         "compile": {
           "bin/placeholder/FNA.dll": {}
         },
@@ -14,15 +63,493 @@
     }
   },
   "libraries": {
+    "Microsoft.NETCore.Platforms/1.1.0": {
+      "sha512": "kz0PEW2lhqygehI/d6XsPCQzD7ff7gUJaVGPVETX611eadGsA3A877GdSlU0LRVMCTH/+P3o2iDTak+S08V2+A==",
+      "type": "package",
+      "path": "microsoft.netcore.platforms/1.1.0",
+      "files": [
+        ".nupkg.metadata",
+        ".signature.p7s",
+        "ThirdPartyNotices.txt",
+        "dotnet_library_license.txt",
+        "lib/netstandard1.0/_._",
+        "microsoft.netcore.platforms.1.1.0.nupkg.sha512",
+        "microsoft.netcore.platforms.nuspec",
+        "runtime.json"
+      ]
+    },
+    "Microsoft.NETFramework.ReferenceAssemblies/1.0.2": {
+      "sha512": "5/cSEVld+px/CuRrbohO/djfg6++eR6zGpy88MgqloXvkj//WXWpFZyu/OpkXPN0u5m+dN/EVwLNYFUxD4h2+A==",
+      "type": "package",
+      "path": "microsoft.netframework.referenceassemblies/1.0.2",
+      "files": [
+        ".nupkg.metadata",
+        ".signature.p7s",
+        "microsoft.netframework.referenceassemblies.1.0.2.nupkg.sha512",
+        "microsoft.netframework.referenceassemblies.nuspec"
+      ]
+    },
+    "Microsoft.NETFramework.ReferenceAssemblies.net45/1.0.2": {
+      "sha512": "Nm14pRmqB+4u2JEMdtngnbDcJidTmswMxOJ992TpTwiwcUTERxLlHwwSh0HiUoRjS0TO0sozsiB0h6FHjCUdEA==",
+      "type": "package",
+      "path": "microsoft.netframework.referenceassemblies.net45/1.0.2",
+      "files": [
+        ".nupkg.metadata",
+        ".signature.p7s",
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+        "build/.NETFramework/v4.5/Accessibility.xml",
+        "build/.NETFramework/v4.5/CustomMarshalers.dll",
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+        "build/.NETFramework/v4.5/Facades/System.Collections.dll",
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+        "build/.NETFramework/v4.5/Facades/System.ComponentModel.EventBasedAsync.dll",
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+        "build/netstandard2.0/ref/System.Threading.Timer.dll",
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+        "build/netstandard2.0/ref/System.Windows.dll",
+        "build/netstandard2.0/ref/System.Xml.Linq.dll",
+        "build/netstandard2.0/ref/System.Xml.ReaderWriter.dll",
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+        "build/netstandard2.0/ref/System.Xml.XDocument.dll",
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+        "build/netstandard2.0/ref/System.Xml.XPath.dll",
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+        "build/netstandard2.0/ref/System.Xml.dll",
+        "build/netstandard2.0/ref/System.dll",
+        "build/netstandard2.0/ref/mscorlib.dll",
+        "build/netstandard2.0/ref/netstandard.dll",
+        "build/netstandard2.0/ref/netstandard.xml",
+        "lib/netstandard1.0/_._",
+        "netstandard.library.2.0.3.nupkg.sha512",
+        "netstandard.library.nuspec"
+      ]
+    },
     "FNA/1.0.0": {
       "type": "project",
-      "path": "../../FNA/FNA.csproj",
-      "msbuildProject": "../../FNA/FNA.csproj"
+      "path": "../../FNA/FNA.Core.csproj",
+      "msbuildProject": "../../FNA/FNA.Core.csproj"
     }
   },
   "projectFileDependencyGroups": {
     ".NETFramework,Version=v4.5": [
-      "FNA >= 1.0.0"
+      "FNA >= 1.0.0",
+      "Microsoft.NETFramework.ReferenceAssemblies >= 1.0.2"
+    ],
+    ".NETStandard,Version=v2.0": [
+      "FNA >= 1.0.0",
+      "NETStandard.Library >= 2.0.3"
     ]
   },
   "packageFolders": {
@@ -31,26 +558,37 @@
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     "restore": {
-      "projectUniqueName": "/home/alys/repos/isometric-park-fna/SpriteFontPlus/src/SpriteFontPlus.FNA.csproj",
+      "projectUniqueName": "/home/alys/repos/isometric-park-fna/SpriteFontPlus/src/SpriteFontPlus.FNA.Core.csproj",
       "projectName": "SpriteFontPlus",
-      "projectPath": "/home/alys/repos/isometric-park-fna/SpriteFontPlus/src/SpriteFontPlus.FNA.csproj",
+      "projectPath": "/home/alys/repos/isometric-park-fna/SpriteFontPlus/src/SpriteFontPlus.FNA.Core.csproj",
       "packagesPath": "/home/alys/.nuget/packages/",
       "outputPath": "/home/alys/repos/isometric-park-fna/SpriteFontPlus/src/obj/",
       "projectStyle": "PackageReference",
+      "crossTargeting": true,
       "configFilePaths": [
-        "/home/alys/.config/NuGet/NuGet.Config"
+        "/home/alys/.nuget/NuGet/NuGet.Config"
       ],
       "originalTargetFrameworks": [
-        "net45"
+        "net45",
+        "netstandard2.0"
       ],
       "sources": {
         "https://api.nuget.org/v3/index.json": {}
       },
       "frameworks": {
         "net45": {
+          "targetAlias": "net45",
           "projectReferences": {
-            "/home/alys/repos/isometric-park-fna/FNA/FNA.csproj": {
-              "projectPath": "/home/alys/repos/isometric-park-fna/FNA/FNA.csproj"
+            "/home/alys/repos/isometric-park-fna/FNA/FNA.Core.csproj": {
+              "projectPath": "/home/alys/repos/isometric-park-fna/FNA/FNA.Core.csproj"
+            }
+          }
+        },
+        "netstandard2.0": {
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+          "projectReferences": {
+            "/home/alys/repos/isometric-park-fna/FNA/FNA.Core.csproj": {
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             }
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         }
@@ -63,7 +601,39 @@
     },
     "frameworks": {
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-        "runtimeIdentifierGraphPath": "/usr/lib/mono/msbuild/Current/bin/RuntimeIdentifierGraph.json"
+        "targetAlias": "net45",
+        "dependencies": {
+          "Microsoft.NETFramework.ReferenceAssemblies": {
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+            "version": "[1.0.2, )",
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+          }
+        },
+        "runtimeIdentifierGraphPath": "/usr/share/dotnet/sdk/6.0.403/RuntimeIdentifierGraph.json"
+      },
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+        "targetAlias": "netstandard2.0",
+        "dependencies": {
+          "NETStandard.Library": {
+            "suppressParent": "All",
+            "target": "Package",
+            "version": "[2.0.3, )",
+            "autoReferenced": true
+          }
+        },
+        "imports": [
+          "net461",
+          "net462",
+          "net47",
+          "net471",
+          "net472",
+          "net48",
+          "net481"
+        ],
+        "assetTargetFallback": true,
+        "warn": true,
+        "runtimeIdentifierGraphPath": "/usr/share/dotnet/sdk/6.0.403/RuntimeIdentifierGraph.json"
       }
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   }
diff --git a/SpriteFontPlus/src/obj/project.nuget.cache b/SpriteFontPlus/src/obj/project.nuget.cache
--- a/SpriteFontPlus/src/obj/project.nuget.cache
+++ b/SpriteFontPlus/src/obj/project.nuget.cache
@@ -1,8 +1,13 @@
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   "success": true,
-  "projectFilePath": "/home/alys/repos/isometric-park-fna/SpriteFontPlus/src/SpriteFontPlus.FNA.csproj",
-  "expectedPackageFiles": [],
+  "projectFilePath": "/home/alys/repos/isometric-park-fna/SpriteFontPlus/src/SpriteFontPlus.FNA.Core.csproj",
+  "expectedPackageFiles": [
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+    "/home/alys/.nuget/packages/microsoft.netframework.referenceassemblies/1.0.2/microsoft.netframework.referenceassemblies.1.0.2.nupkg.sha512",
+    "/home/alys/.nuget/packages/microsoft.netframework.referenceassemblies.net45/1.0.2/microsoft.netframework.referenceassemblies.net45.1.0.2.nupkg.sha512",
+    "/home/alys/.nuget/packages/netstandard.library/2.0.3/netstandard.library.2.0.3.nupkg.sha512"
+  ],
   "logs": []
 }
\ No newline at end of file