Support for WPF Core

[AbrarJahin]

Please add support for wpf core. I am finding this working when using WPF Core-

Severity	Code	Description	Project	File	Line	Suppression State
Warning	NU1701	Package 'ModernMessageBoxLib 1.3.1' was restored using '.NETFramework,Version=v4.6.1, 
.NETFramework,Version=v4.6.2, .NETFramework,Version=v4.7, .NETFramework,Version=v4.7.1, 
.NETFramework,Version=v4.7.2, .NETFramework,Version=v4.8' instead of the project target framework '.NETCoreApp,Version=v3.1'. This package may not be fully compatible with your project.	XMLSigner	C:\Users\abrar\Desktop\BCC-CA_XMLSigningClient\XMLSigner.csproj	1	

But working fine. Though, adding support for Dot.Net Core would be great.

[hv0905]

Nice idea, I will try to support it soon.

[hv0905]

I have tried to publish netcore version of ModernMessageboxLib at branch netcore.
The package will be available several hours later in here.
Please keep this issue open and report anything wrong with the new dotnet core package here.