Merge pull request #3070 from MicrosoftDocs/repo_sync_working_branch

Confirm merge from repo_sync_working_branch to master to sync with https://github.com/MicrosoftDocs/visualstudio-docs (branch master)

Author: gewarren

docs/msbuild/customize-your-build.md

@@ -28,6 +28,11 @@ Prior to MSBuild version 15, if you wanted to provide a new, custom property to
 
 However, now you can add a new property to every project in one step by defining it in a single file called *Directory.Build.props* in the root folder that contains your source. When MSBuild runs, *Microsoft.Common.props* searches your directory structure for the *Directory.Build.props* file (and *Microsoft.Common.targets* looks for *Directory.Build.targets*). If it finds one, it imports the property. *Directory.Build.props* is a user-defined file that provides customizations to projects under a directory.
 
+> [!NOTE]
+> Linux-based file systems are case-sensitive. Make sure the casing of the Directory.Build.props filename matches exactly, or it won't be detected during the build process.
+>
+> See [this GitHub issue](https://github.com/dotnet/core/issues/1991#issue-368441031) for more information.
+
 ### Directory.Build.props example
 
 For example, if you wanted to enable all of your projects to access the new Roslyn **/deterministic** feature (which is exposed in the Roslyn `CoreCompile` target by the property `$(Deterministic)`), you could do the following.