I am pretty language agnostic and I am reasonably competent programming in C# (I worked with C# and VB.NET for about 15 years), Go, Python, TypeScript and C++ these days.
The issue with a lot of places that do C#/.NET stuff is that they will typically ignore new tech until it is officially blessed by Microsoft. You can have a piece of tech that everyone is using and works really well and it will be ignored if it isn't blessed by Microsoft.
The other issue with .NET is all the Microsoft gumpf that tends to come with it even with the newer versions of .NET.
I am also in the weird place of being a Linux user. I've had job interviews that wanted to do live coding exercise/take home code exercise and they expect you to do everything in Visual Studio with SQL Server.