Indentation on .csproj breaks the build

[darioquintana]

Indentation breaks the .csproj file.

Error:

dotnet build DoesntWorks.csproj
Microsoft (R) Build Engine version 15.7.177.53362 for .NET Core
Copyright (C) Microsoft Corporation. All rights reserved.

  Restore completed in 40.4 ms for /Users/dario/src/core-dal/src/CoreViejo/DoesntWorks.csproj.
/usr/local/share/dotnet/sdk/2.1.200/Sdks/Microsoft.NET.Sdk/build/Microsoft.NET.TargetFrameworkInference.targets(96,5): error : The TargetFramework value 'netcoreapp2.0' was not recognized. It may be misspelled. If not, then the TargetFrameworkIdentifier and/or TargetFrameworkVersion properties must be specified explicitly. [/Users/dario/src/core-dal/src/CoreViejo/DoesntWorks.csproj]

Build FAILED.

/usr/local/share/dotnet/sdk/2.1.200/Sdks/Microsoft.NET.Sdk/build/Microsoft.NET.TargetFrameworkInference.targets(96,5): error : The TargetFramework value 'netcoreapp2.0' was not recognized. It may be misspelled. If not, then the TargetFrameworkIdentifier and/or TargetFrameworkVersion properties must be specified explicitly. [/Users/dario/src/core-dal/src/CoreViejo/DoesntWorks.csproj]
    0 Warning(s)
    1 Error(s)

Time Elapsed 00:00:01.06

File that works:

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFramework>netcoreapp2.0</TargetFramework>
  </PropertyGroup>

</Project>

Indented file that doesn't works:

<Project Sdk="Microsoft.NET.Sdk">
	<PropertyGroup>
		<TargetFramework>
			netcoreapp2.0
		</TargetFramework>
	</PropertyGroup>
</Project>

Solution:
Disabling indentation tool on Visual Studio Code for .csproj files.

My dotnet --info:

.NET Command Line Tools (2.1.200)

Product Information:
 Version:            2.1.200
 Commit SHA-1 hash:  2edba8d7f1

Runtime Environment:
 OS Name:     Mac OS X
 OS Version:  10.13
 OS Platform: Darwin
 RID:         osx.10.13-x64
 Base Path:   /usr/local/share/dotnet/sdk/2.1.200/

Microsoft .NET Core Shared Framework Host

  Version  : 2.0.7
  Build    : 2d61d0b043915bc948ebf98836fefe9ba942be11

[livarcocc]

I don't believe the problem here is the indentation but the newlines in the target framework value.

[robquinn]

@livarcocc thank you a million times...the newlines in my csproj were causing the build to throw this error:

error NETSDK1013: The TargetFramework value 'netcoreapp3.1' was not recognized. It may be misspelled. If not, then the TargetFrameworkIdentifier and/or TargetFrameworkVersion properties must be specified explicitly.

I could not figure it out, was pulling my hair out for hours.

[nkolev92]

A space has the same issue.

<TargetFramework> net461</TargetFramework>

[nkolev92]

cc @isaacabraham @terrajobst

[timheuer]

Reported as well on DevComm: https://developercommunity.visualstudio.com/t/XML-reformatting-breaks-the-csproj/1542470

[BobFrankston]

The proper title is

Whitespace is not being trimmed

This is far simpler than this discussion indicates. Normally leading and trailing whitespace is ignored in HTML and XML. Simply observing that convention solves the problem. The bug is not that the build fails, the bug is that whitespace is significant.

I was amused by http://usingxml.com/Basics/XmlSpace which complained that the default Microsoft parse trims whitespace.

There are no newlines, indentations, or whatever. There is just whitespace that is to be trimmed.