c# - 简化 LINQ 表达式

Question

我有一部分代码我真的不喜欢，如果有可能以某种方式简化它 - 会非常好。

A a; // I want to get rid of this variable
if((a = collection.FirstOrDefault(x => x.Field == null)) != null)
{
  throw new ScriptException("{0}", a.y); //I need to access other field of the object here, that's why I had to declare a variable outside of the expression
}

Answer 1

如果将变量赋值和定义结合起来，可以使代码更具可读性:

A a = collection.FirstOrDefault(x => x.Field == null);

if(a != null)    
   throw new ScriptException("{0}", a.y);