1,272 questions
.net 6 is completely separate from .net 4,*. It installs in different folders and runs side by side. Even different versions of .net core have no effect on each other.
Is it Safe to Install .NET 6 Runtimes While there are Apps Running on .NET 4.x ?
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(140.8, 46%, 23%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAA%3C/text%3E%3C/svg%3E)
Abdurhman Alsobhi
21
Reputation points
We have very critical applications running on .NET 4.5, We want to deploy a new application built for .NET 6, Is it safe to install .NET 6 ?, The currently running applications should never stop running.
Thank you.
Developer technologies | .NET | .NET Runtime
Developer technologies | C#
11,579 questions
Accepted answer
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(211.20000000000002, 61%, 30%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EBS%3C/text%3E%3C/svg%3E)
Bruce (SqlWork.com) 78,086 Reputation points Volunteer Moderator2022-03-19T19:58:33.423+00:00 -
Abdurhman Alsobhi 21 Reputation points
2022-03-19T20:11:06.867+00:00 thank you, does the same apply on .NET 3.x ? (installing .net 6 on a machine running .net 3.x )
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Bruce (SqlWork.com) 78,086 Reputation points Volunteer Moderator
2022-03-20T00:00:31.383+00:00 yes,
for the classic .net 1., net 2., net 3.* & 4.* all run side by side. but if you update, say 4.0 to 4.8, this is an update in place.
for .net core, all major and minor versions are side by side.
now, if you windows o/s is as out of date as your .net runtimes, you my need to install a service pack first. see
https://learn.microsoft.com/en-us/dotnet/core/install/windows?tabs=net60
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Karen Payne MVP 35,586 Reputation points Volunteer Moderator2022-03-19T22:06:00.543+00:00 .NET Framework 1.0 through 4.8 is not compatible with and version of .NET Core and .NET Core is not compatible with .NET Framework 1.0 through 4.8.