Check if list contains element that contains a string and get that element

Question

While searching for an answer to this question, I\'ve run into similar ones utilizing LINQ but I haven\'t been able to fully understand them (and thus, implement them), as I

Answer 1

Many good answers here, but I use a simple one using Exists, as below:

foreach (var setting in FullList)
{
    if(cleanList.Exists(x => x.ProcedureName == setting.ProcedureName)) 
       setting.IsActive = true; // do you business logic here 
    else
       setting.IsActive = false;
    updateList.Add(setting);
}