webview2 need .net 4.7.1 to run and unable on .net 4.5

[shengwen2000]

Description

when call EnsureCoreWebView2Async() throw a exception "Could not load type ''System.Runtime.InteropServices.RuntimeInformation' from assembly 'mscorlib, version=4.0.0.0"

System.Runtime.InteropServices.RuntimeInformation require .net 4.7.1 above

Version
SDK: https://www.nuget.org/packages/Microsoft.Web.WebView2/1.0.902.49
Runtime: 92.0.902.73
Framework: WinForms
OS: Win7

Repro Steps

var opt = new CoreWebView2EnvironmentOptions();
var env = await CoreWebView2Environment.CreateAsync(null, null, opt);
await this.webView21.EnsureCoreWebView2Async(env);
this.webView21.Source = new Uri("https://www.google.com");

Screenshots

Additional context

[champnic]

hey @shengwen2000, thanks for the bug report! This is a known issue we're working on here: #946.