Update BuildFromSource.md (#25606)

ajaybhargavb · web-flow · commit 3d042ac9aaf6 · 2020-09-08T08:45:01.000-07:00
diff --git a/docs/BuildFromSource.md b/docs/BuildFromSource.md
@@ -290,4 +290,4 @@ These are available in the [Visual Studio Preview](https://www.visualstudio.com/
 
 ## Resx files
 
-If you need to make changes to a .resx file, run `dotnet msbuild /t:Resx <path to csproj>`. This will update the generated C#.
+If you need to make changes to a .resx file, run `dotnet msbuild t:/Resgen <path to csproj>`. This will update the generated C#.

Original file line number	Diff line number	Diff line change
`@@ -290,4 +290,4 @@ These are available in the [Visual Studio Preview](https://www.visualstudio.com/`
`290`	`290`
`291`	`291`	`## Resx files`
`292`	`292`
`293`		-If you need to make changes to a .resx file, run `dotnet msbuild /t:Resx <path to csproj>`. This will update the generated C#.
	`293`	+If you need to make changes to a .resx file, run `dotnet msbuild t:/Resgen <path to csproj>`. This will update the generated C#.