WebJun 27, 2006 · foreach (clsInterface vinterface in oInterfaces.Values) { func1 ( ref vinterface ); } Error: Cannot pass 'vinterface' as a ref or out argument because it is a 'foreach iteration variable' I tried to use for statement but it's seem that "vinterface = oInterfaces [0];" isn't correct. Because the index "i" isn't a key. WebMar 13, 2024 · Readonly contexts include foreach iteration variables, using variables, and fixed variables. To resolve this error, do not call functions that take the foreach, using or fixed variable as a ref or out parameter in using blocks, foreach statements, and fixed statements. Example 1. The following sample generates CS1657:
Explained: C#’s foreach loop as a read-only loop · Kodify
WebFeb 8, 2024 · You add the ref keyword before the type of a variable to declare a ref local. A ref local is a variable that refers to other storage. Assume the GetContactInformation method is declared as a ref return: C#. public ref Person GetContactInformation(string fname, string lname) Let's contrast these two assignments: C#. WebOct 4, 2024 · # Infer the foreach loop variable type automatically with var The foreach loop is an elegant way to loop through a collection. With this loop we first define a loop variable. C# then automatically sets that variable to each element of the collection we loop over. That saves some of the hassles that other loops have. dahmer honor society photo
Cannot modify the return value of ?? because it is not a variable
WebApr 21, 2024 · A compile-time error occurs if the embedded statement attempts to modify these local variables (via assignment or the ++ and -- operators) , take the address of them, or pass them as ref or out parameters. There is no mention of instance methods being illegal but ref and out parameters are clearly forbidden. Contributor WebThe other answers here have told you what you can do instead: either copy the iteration variable into another variable and trim that, or skip the assignment altogether and add the trimmed value directly. Rob Kennedy 159523 score:8 You're trying to change the value of the item you're working on. Just do WebDec 28, 2024 · Can’t modify members because it is a foreach iteration variable, use a for loop. I had a requirement where I received a generic list from a method and needed to … dahmer honor society picture