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Dealing with Mono under Fedora 25

Dealing with Mono under Fedora 25

As you know the new Fedora come with dnf tool options you can use to define a DNF repository ( see link ).
This can be a problem for new users if want to install the mono development tools because they can get this error:
...
warning: /var/cache/dnf/download.mono-project.com_repo_centos-beta_-36cf85be8e79dffc/packages/mono-devel-4.8.0.483-0.xamarin.1.x86_64.rpm: Header V4 RSA/SHA256 Signature, key ID d3d831ef: NOKEY
The downloaded packages were saved in cache until the next successful transaction.
You can remove cached packages by executing dnf clean packages.
Error: Public key for mono-devel-4.8.0.483-0.xamarin.1.x86_64.rpm is not installed

To fix that error you just need to use this commands:

[root@localhost mythcat]# rpm  --import "http://keyserver.ubuntu.com/pks/lookup?op=get&search=0x3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF"
[root@localhost fedora25_test001]# dnf config-manager --add-repo http://jenkins.mono-project.com/repo/centos/
Adding repo from: http://jenkins.mono-project.com/repo/centos/
[root@localhost fedora25_test001]# dnf update
[root@localhost mythcat]# dnf install mono-devel
...

[root@localhost mythcat]# dnf install monodevelop

Now you can start the monodevelop with this command:

[mythcat@localhost ~]$ monodevelop

I make a simple mono GTK# window into few steps:
The result of project come with this files:

[mythcat@localhost ~]$ cd fedora25_test001/
[mythcat@localhost fedora25_test001]$ ll
total 100408
-rw-rw-r--. 1 mythcat mythcat     4163 Feb  5 23:17 Assembly-CSharp.csproj
-rw-rw-r--. 1 mythcat mythcat     4163 Feb  5 23:17 Assembly-CSharp-vs.csproj
drwxr-xr-x. 2 mythcat mythcat      228 Feb  5 23:17 Assets
-rw-rw-r--. 1 mythcat mythcat     1452 Feb  5 23:17 fedora25_test001-csharp.sln
-rw-rw-r--. 1 mythcat mythcat     1448 Feb  5 23:17 fedora25_test001.sln
drwxr-xr-x. 4 mythcat mythcat     4096 Feb  5 23:39 Library
drwxr-xr-x. 2 mythcat mythcat     4096 Feb  5 23:39 ProjectSettings
drwxrwxr-x. 6 mythcat mythcat      143 Feb  5 23:18 test_Data
-rwxr-xr-x. 1 mythcat mythcat 49128408 Feb  5 23:18 test.x86
-rwxr-xr-x. 1 mythcat mythcat 53652633 Feb  5 23:18 test.x86_64

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