diff --git a/.gitattributes b/.gitattributes
index b3f01d77..cbdfc007 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -16,6 +16,7 @@
 *.vcxproj -whitespace
 *.vcxproj.filters -whitespace
 *.patch -whitespace
+*.props -whitespace
 *.svg -whitespace
 *.xml -whitespace
 *.yml -whitespace
diff --git a/source/Directory.Build.props b/source/Directory.Build.props
new file mode 100644
index 00000000..55dc81d9
--- /dev/null
+++ b/source/Directory.Build.props
@@ -0,0 +1,25 @@
+<Project>
+  <PropertyGroup>
+    <TargetFrameworks>net40;net451;netstandard1.6</TargetFrameworks>
+    <PlatformAlias>netstandard</PlatformAlias>
+    <OutputPath>$(MSBuildThisFileDirectory)\..\output\$(Configuration)</OutputPath>
+    <PackageOutputPath>$(MSBuildThisFileDirectory)\..\output</PackageOutputPath>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <Company>SIL International</Company>
+    <Authors>SIL International</Authors>
+    <Copyright>Copyright © 2007-2022 SIL International</Copyright>
+    <PackageLicenseExpression>MIT</PackageLicenseExpression>
+    <PackageProjectUrl>https://github.com/sillsdev/icu-dotnet</PackageProjectUrl>
+    <AppendToReleaseNotesProperty><![CDATA[
+See full changelog at https://github.com/sillsdev/icu-dotnet/blob/master/CHANGELOG.md.]]>
+    </AppendToReleaseNotesProperty>
+    <ChangelogFile>$(MSBuildThisFileDirectory)/../CHANGELOG.md</ChangelogFile>
+    <IncludeSymbols>true</IncludeSymbols>
+    <SymbolPackageFormat>snupkg</SymbolPackageFormat>
+    <LangVersion>7.1</LangVersion>
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+    <SignAssembly>true</SignAssembly>
+    <AssemblyOriginatorKeyFile>$(MSBuildThisFileDirectory)/icu.net.snk</AssemblyOriginatorKeyFile>
+  </PropertyGroup>
+</Project>
\ No newline at end of file
diff --git a/source/icu.net.netstandard.testrunner/icu.net.netstandard.testrunner.csproj b/source/icu.net.netstandard.testrunner/icu.net.netstandard.testrunner.csproj
index 2f41651e..53cba996 100644
--- a/source/icu.net.netstandard.testrunner/icu.net.netstandard.testrunner.csproj
+++ b/source/icu.net.netstandard.testrunner/icu.net.netstandard.testrunner.csproj
@@ -1,8 +1,8 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
+    <TargetFrameworks/> <!-- override value from Directory.Build.props -->
     <TargetFramework>netcoreapp3.1</TargetFramework>
-    <OutputPath>../../output/$(Configuration)</OutputPath>
     <IsPackable>false</IsPackable>
   </PropertyGroup>
   <ItemGroup>
diff --git a/source/icu.net.netstandard.tests/icu.net.netstandard.tests.csproj b/source/icu.net.netstandard.tests/icu.net.netstandard.tests.csproj
deleted file mode 100644
index a37306b6..00000000
--- a/source/icu.net.netstandard.tests/icu.net.netstandard.tests.csproj
+++ /dev/null
@@ -1,30 +0,0 @@
-<Project Sdk="Microsoft.NET.Sdk">
-
-  <PropertyGroup>
-    <IcuSourceDirectory>..\icu.net.tests</IcuSourceDirectory>
-
-    <TargetFramework>netcoreapp1.1</TargetFramework>
-  </PropertyGroup>
-
-  <ItemGroup>
-    <PackageReference Include="Icu4c.Win.Full.Lib" Version="56.1.21" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.5.0" />
-    <PackageReference Include="NUnit" Version="3.9.0" />
-    <PackageReference Include="NUnit3TestAdapter" Version="3.9.0" />
-    <PackageReference Include="NUnit.Console" Version="3.7.0" />
-  </ItemGroup>
-
-  <ItemGroup>
-    <ProjectReference Include="..\icu.net.netstandard\icu.net.netstandard.csproj" />
-  </ItemGroup>
-
-
-  <ItemGroup>
-    <Compile Include="$(IcuSourceDirectory)\**\*.cs">
-      <Link>%(RecursiveDir)%(Filename)%(Extension)</Link>
-    </Compile>
-  </ItemGroup>
-
-  <Target Name="CreateNuGetPackage">
-  </Target>
-</Project>
diff --git a/source/icu.net/icu.net.snk b/source/icu.net.snk
similarity index 100%
rename from source/icu.net/icu.net.snk
rename to source/icu.net.snk
diff --git a/source/icu.net.tests/icu.net.tests.csproj b/source/icu.net.tests/icu.net.tests.csproj
index 38540813..655c82d8 100644
--- a/source/icu.net.tests/icu.net.tests.csproj
+++ b/source/icu.net.tests/icu.net.tests.csproj
@@ -2,13 +2,7 @@
   <PropertyGroup>
     <TargetFrameworks>net461;netcoreapp3.1</TargetFrameworks>
     <RootNamespace>Icu.Tests</RootNamespace>
-    <Configurations>Debug;Release</Configurations>
-    <OutputPath>../../output/$(Configuration)</OutputPath>
     <AssemblyTitle>icu.net.tests</AssemblyTitle>
-    <Company>SIL</Company>
-    <Copyright>Copyright © 2018-2022 SIL International</Copyright>
-    <ErrorReport>prompt</ErrorReport>
-    <WarningLevel>4</WarningLevel>
     <IsPackable>false</IsPackable>
     <LangVersion>8</LangVersion>
   </PropertyGroup>
diff --git a/source/icu.net/icu.net.csproj b/source/icu.net/icu.net.csproj
index 4bc8d5d1..8abcd188 100644
--- a/source/icu.net/icu.net.csproj
+++ b/source/icu.net/icu.net.csproj
@@ -1,33 +1,12 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net40;net451;netstandard1.6</TargetFrameworks>
-    <PlatformAlias>netstandard</PlatformAlias>
-    <OutputPath>..\..\output\$(Configuration)</OutputPath>
-    <PackageOutputPath>..\..\output</PackageOutputPath>
     <RootNamespace>Icu</RootNamespace>
     <AssemblyName>icu.net</AssemblyName>
-    <ErrorReport>prompt</ErrorReport>
-    <WarningLevel>4</WarningLevel>
-    <Company>SIL International</Company>
-    <Authors>SIL International</Authors>
-    <PackageLicenseExpression>MIT</PackageLicenseExpression>
-    <PackageProjectUrl>https://github.com/sillsdev/icu-dotnet</PackageProjectUrl>
-    <Copyright>Copyright © 2007-2022 SIL International</Copyright>
     <Description>icu.net is a C# Wrapper around ICU4C
 
 This version of icu.net works with (more or less) any version of ICU4C.
 
 NOTE: this package contains the managed wrapper part of icu.net. You'll also have to have the unmanaged binaries of ICU installed. On Linux it is recommended to install the official ICU package that comes with the system. On Windows you can install one of the binary nuget packages, e.g. Icu4c.Win.</Description>
-    <AppendToReleaseNotesProperty><![CDATA[
-See full changelog at https://github.com/sillsdev/icu-dotnet/blob/master/CHANGELOG.md.]]>
-    </AppendToReleaseNotesProperty>
-    <ChangelogFile>../../CHANGELOG.md</ChangelogFile>
-    <IncludeSymbols>true</IncludeSymbols>
-    <SymbolPackageFormat>snupkg</SymbolPackageFormat>
-    <LangVersion>7.1</LangVersion>
-    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
-    <SignAssembly>true</SignAssembly>
-    <AssemblyOriginatorKeyFile>icu.net.snk</AssemblyOriginatorKeyFile>
   </PropertyGroup>
   <!-- Full .NET Framework properties -->
   <PropertyGroup Condition="'$(TargetFramework)' != 'netstandard1.6'">