摘要：
ProgramFilesdotnetsdk]2.2.110[C:ProgramFilesdotnetsharedMicrosoft.NETCore.App]Microsoft.NETCore.App2.2.8[C:https://https://share/dotnet/sdk]版本：2.2.402[NETCore.runtimesinstalled:https:
原环境：
.NET Core SDK（反映任何 global.json）:
Version: 2.2.110
Commit: 4797dabd3c
运行时环境:
OS Name: Windows
OS Version: 6.1.7601
OS Platform: Windows
RID: win7-x64
Base Path: C:Program Filesdotnetsdk2.2.110
Host (useful for support):
Version: 2.2.8
Commit: b9aa1abc51
.NET Core SDKs installed:
2.1.522 [C:Program Filesdotnetsdk]
2.2.110 [C:Program Filesdotnetsdk]
.NET Core runtimes installed:
Microsoft.AspNetCore.All 2.1.26 [C:Program FilesdotnetsharedMicrosoft.AspN
etCore.All]
Microsoft.AspNetCore.All 2.2.8 [C:Program FilesdotnetsharedMicrosoft.AspNe
tCore.All]
Microsoft.AspNetCore.App 2.1.26 [C:Program FilesdotnetsharedMicrosoft.AspN
etCore.App]
Microsoft.AspNetCore.App 2.2.8 [C:Program FilesdotnetsharedMicrosoft.AspNe
tCore.App]
Microsoft.NETCore.App 2.1.26 [C:Program FilesdotnetsharedMicrosoft.NETCore
.App]
Microsoft.NETCore.App 2.2.8 [C:Program FilesdotnetsharedMicrosoft.NETCore.
App]
To install additional .NET Core runtimes or SDKs:
https://aka.ms/dotnet-download现环境：
root@servercore:~# dotnet --info
.NET Core SDK (reflecting any global.json):
Version: 2.2.402
Commit: c7f2f96116
Runtime Environment:
OS Name: ubuntu
OS Version: 18.04
OS Platform: Linux
RID: ubuntu.18.04-x64
Base Path: /usr/share/dotnet/sdk/2.2.402/
Host (useful for support):
Version: 2.2.8
Commit: b9aa1abc51
.NET Core SDKs installed:
2.2.402 [/usr/share/dotnet/sdk]
.NET Core runtimes installed:
Microsoft.AspNetCore.All 2.2.8 [/usr/share/dotnet/shared/Microsoft.AspNetCore.All]
Microsoft.AspNetCore.App 2.2.8 [/usr/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.NETCore.App 2.2.8 [/usr/share/dotnet/shared/Microsoft.NETCore.App]
To install additional .NET Core runtimes or SDKs:
https://aka.ms/dotnet-download当然sdk使用2.2.108比2.2.110可能要稳一点，微软官方开发环境的最佳sdk版本图：
| OS | Development Environment | .NET Core SDK |
|---|---|---|
| Any supported | Command line and/or Visual Studio Code | 2.2.401 |
| Windows | Visual Studio 2019 version 16.2 | 2.2.401 |
| Windows | Visual Studio 2019 version 16.1 | 2.2.301 |
| Windows | Visual Studio 2019 version 16.0 | 2.2.205 |
| Windows | Visual Studio 2017 | 2.2.108 |
二，验证过程
1.卸载（参照：微软文档）：
dpkg --list #查看安装的包#apt-get remove 要删除的包apt-get remove dotnet-hostapt-get remove dotnet-hostfxrapt-get remove dotnet-runtimeapt-get remove dotnet-sdk-2.22.安装：
wget -q https://packages.microsoft.com/config/ubuntu/18.04/packages-microsoft-prod.deb -O packages-microsoft-prod.deb
sudo dpkg -i packages-microsoft-prod.deb
sudo apt-get install apt-transport-https
sudo apt-get update
sudo apt-get install dotnet-sdk-2.2=2.2.110-1#sudo apt-get install dotnet-sdk-2.2=2.2.108-13.查看修改完的环境：
.NET Core SDK (reflecting any global.json):
Version: 2.2.110
Commit: 4797dabd3c
Runtime Environment:
OS Name: ubuntu
OS Version: 18.04
OS Platform: Linux
RID: ubuntu.18.04-x64
Base Path: /usr/share/dotnet/sdk/2.2.110/
Host (useful for support):
Version: 2.2.8
Commit: b9aa1abc51
.NET Core SDKs installed:
2.2.110 [/usr/share/dotnet/sdk]
.NET Core runtimes installed:
Microsoft.AspNetCore.All 2.2.8 [/usr/share/dotnet/shared/Microsoft.AspNetCore.All]
Microsoft.AspNetCore.App 2.2.8 [/usr/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.NETCore.App 2.2.8 [/usr/share/dotnet/shared/Microsoft.NETCore.App]
To install additional .NET Core runtimes or SDKs:
https://aka.ms/dotnet-downloadOK,修改完毕。