Question

I am trying to loop through a list of strings and check them against a single string. If nothing is found that matches then we need to exit the code.

// loadedObj.Settings contains the list of strings, can be any number of strings     
foreach (var currentCheckBox in loadedObj.Settings.Where(currentCheckBox => currentCheckBox != null))
    {   
        // docTypeAlias is a single string that needs to be matched
        var docTypeAlias = sender.ContentType.Alias;
        // This is the current value of currentCheckBox
        var requiredTypeAlias = currentCheckBox;
        if (!requiredTypeAlias.Equals(docTypeAlias)) return;
    }

The code works fine if there is only 1 string in Settings, but as soon as you have multiple strings, if the first one doesn’t match obviously the code exits too soon.

Answer 1

You can use Any to see if any element in the sequence matches your criteria. If none do, the result will be false.

var docTypeAlias = sender.ContentType.Alias; 
bool hasMatch = loadedObj.Settings.Any(current => docTypeAlias.Equals(current));
if (hasMatch)
{
    // can work
}
else
{
    // can't work
}