Can someone please explain to me what does the question mark in the member access in the following code means?
Is it part of standard C#? I get parse errors when trying to compile this file in Xamarin Studio.
this.AnalyzerLoadFailed?.Invoke(this, new AnalyzerLoadFailureEventArgs(AnalyzerLoadFailureEventArgs.FailureErrorCode.NoAnalyzers, null, null));
AnalyzerFileReference.cs line 195
It is Null Propagation operator introduced in C# 6, it will call the method only if object this.AnalyzerLoadFailed is not null:
this.AnalyzerLoadFailed?.Invoke(this, new AnalyzerLoadFailureEventArgs(AnalyzerLoadFailureEventArgs.FailureErrorCode.NoAnalyzers, null, null));
is equal to :
if( this.AnalyzerLoadFailed != null)
this.AnalyzerLoadFailed.Invoke(this, new AnalyzerLoadFailureEventArgs(AnalyzerLoadFailureEventArgs.FailureErrorCode.NoAnalyzers, null, null));
See C# 6.0 – Null Propagation Operator , also you can see here
i also once wrote about this upcoming feature in c# 6 here
Collected from the Internet
Please contact [email protected] to delete if infringement.
Comments