I want to clarify BJ Myers’s (correct) answer. In C# an event can be thought of as a field of delegate type — just as a property can be thought of as a field of the property type — and the value of that “field” can be null. If you are in the unfortunate situation … Read more
Yes, you can install c# 6.0 into VS2012 and VS2013 on a per project basis as a NuGet package. You’ll have to install this package for every project that you want c# 6.0 features in. https://www.nuget.org/packages/Microsoft.Net.Compilers/ Installing Latest C# Compiler via Nuget Install-Package Microsoft.Net.Compilers EDIT: As pointed out in the comments below, upgrade your NuGet … Read more
The problem can be fixed installing a Nuget package Microsoft.Net.Compilers. Below is the link of my highlighted answer: Project builds fine with Visual Studio but fails from the command line That feature is a syntactic sugar for C#6, try to install the latest version of the framework 4.6.2 https://www.microsoft.com/en-us/download/details.aspx?id=53345 Then go to your Project properties … Read more
It won’t work this way. You can just skip the explanation and see the code below 🙂 As you know ?. operator will return null if a child member is null. But what happens if we try to get a non-nullable member, like the Any() method, that returns bool? The answer is that the compiler … Read more
Does anyone have any ideas about what could be going on? Yup – primary constructors have been removed from the plans for C# 6. They may well make an appearance in some form in a later version, but they’re not in C# 6 any more. See the “Changes to the language feature set” post from … Read more
I’ve tested this with ASP.NET MVC 5 (tested 5.2.3), and your mileage may vary with other web frameworks, but you just need to add the NuGet package for Roslyn CodeDOM. Microsoft.CodeDom.Providers.DotNetCompilerPlatform should add the DLL files… PM> Install-Package Microsoft.CodeDom.Providers.DotNetCompilerPlatform Replacement CodeDOM providers that use the new .NET Compiler Platform (“Roslyn”) compiler as a service APIs. … Read more
After incorporating the various changes, the code will look like this. I’ve highlighted with comments the parts that changed and how each one helps public class Data : INotifyPropertyChanged { public event PropertyChangedEventHandler PropertyChanged; protected void OnPropertyChanged([CallerMemberName] string propertyName = null) { //C# 6 null-safe operator. No need to check for event listeners //If there … Read more
An interpolated string evaluates the block between the curly braces as a C# expression (e.g. {expression}, {1 + 1}, {person.FirstName}). This means that the expressions in an interpolated string must reference names in the current context. For example this statement will not compile: var nameFormat = $”My name is {name}”; // Cannot use *name* // … Read more
This is a new C# 6 feature, “Getter-only auto-properties”, also known as “Auto-Property Initializers for Read-Only Properties” as discussed in this MSDN magazine article ‘C# : The New and Improved C# 6.0’ by Mark Michaelis and in the C# 6.0 draft Language Specification. The read-only field’s setter is only accessible in the constructor, in all … Read more
In a new C# 6.0 we can define methods and properties using lambda expressions. No, you can’t. You can define method and property bodies using syntax which looks like a lambda expression, in that it uses the token =>. However, importantly this does not mean that there’s a delegate type involved. (Whereas a lambda expression … Read more