It is expected that some methods should be called with caution, but others, such as ToString, are expected to "just work". Throwing an exception from such a method is likely to break callers' code unexpectedly.

An issue is raised when an exception is thrown from any of the following:

• Event accessors
• Object.Equals
• IEquatable.Equals
• GetHashCode
• ToString
• static constructors
• Module initializers
• IDisposable.Dispose
• operators ==, !=, <, >, <=, >=
• implicit cast operators

Noncompliant Code Example

public override string ToString()
{
  if (string.IsNullOrEmpty(Name))
  {
    throw new ArgumentException("...");  // Noncompliant
  }
  //...

Exceptions

System.NotImplementedException and its derivatives are ignored.

System.InvalidOperationException, System.NotSupportedException, and System.ArgumentException and their derivatives are ignored in event accessors.