C# Feature - Throw expressions

Overview

Throw expressions let throw appear where an expression is expected, which is useful for argument guards and concise members.

Introduced In

C# 7.0 (2017)

Before

if (name == null)
{
  throw new ArgumentNullException(nameof(name));
}

After

_name = name ?? throw new ArgumentNullException(nameof(name));

Gotchas & Best Practices

• Use throw expressions for short guard clauses, not complicated logic.
• They pair especially well with ?? and expression-bodied members.