ALBERT SITE

first you need to use follow command to get detail rpm files   

repotrack -a x86_64 -p /repos/Packages rh-dotnet20 

and install dotnet20 rpms order by follow  

1. rh-dotnet20-runtime-2.0-6.el7.x86_64.rpm

2. rh-dotnet20-libcurl-7.47.1-1.4.el7.x86_64.rpm

3. rh-dotnet20-dotnet-host-2.0.9-3.el7.x86_64.rpm

4. libunwind-1.2-2.el7.x86_64.rpm

5. rh-dotnet20-userspace-rcu-0.9.2-3.el7.x86_64.rpm

6. rh-dotnet20-lttng-ust-2.8.1-3.el7.x86_64.rpm

7. rh-dotnet20-dotnet-runtime-2.0-2.0.9-3.el7.x86_64.rpm

8. rh-dotnet20-dotnet-sdk-2.0-2.0.3-4.el7.x86_64.rpm

9. rh-dotnet20-dotnet-2.0.9-3.el7.x86_64.rpm

10.  rh-dotnet20-2.0-6.el7.x86_64.rpm

finally run scl command to active dotnet

scl enable rh-dotnet20 bash