|  BaseMessage | Basic error message. All versions. | 
|  Code | Error code. PostgreSQL 7.4 and up. | 
|  Detail | Detailed error message. PostgreSQL 7.4 and up. | 
|  Errors | Returns the entire list of errors provided by the PostgreSQL backend. | 
|  File | Source file (in backend) reporting the error. PostgreSQL 7.4 and up. | 
|  HelpLink (inherited from Exception) | Gets or sets a link to the help file associated with this exception. | 
|  Hint | Suggestion to help resolve the error. PostgreSQL 7.4 and up. | 
|  InnerException (inherited from Exception) | Gets the Exception instance that caused the current exception. | 
|  Item | Provide access to the entire list of errors provided by the PostgreSQL backend. | 
|  Line | Source file line number (in backend) reporting the error. PostgreSQL 7.4 and up. | 
|  Message (inherited from Exception) | Gets a message that describes the current exception. | 
|  Position | Position (one based) within the query string where the error was encounterd. PostgreSQL 7.4 and up. | 
|  Routine | Source routine (in backend) reporting the error. PostgreSQL 7.4 and up. | 
|  Severity | Severity code. All versions. | 
|  Source (inherited from Exception) | Gets or sets the name of the application or the object that causes the error. | 
|  StackTrace (inherited from Exception) | Gets a string representation of the frames on the call stack at the time the current exception was thrown. | 
|  TargetSite (inherited from Exception) | Gets the method that throws the current exception. | 
|  Where | Trace back information. PostgreSQL 7.4 and up. | 
|  Equals (inherited from Object) | Determines whether the specified Object is equal to the current Object. | 
|  GetBaseException (inherited from Exception) | When overridden in a derived class, returns the Exception that is the root cause of one or more subsequent exceptions. | 
|  GetHashCode (inherited from Object) | Serves as a hash function for a particular type, suitable for use in hashing algorithms and data structures like a hash table. | 
|  GetObjectData (inherited from Exception) | When overridden in a derived class, sets the SerializationInfo with information about the exception. | 
|  GetType (inherited from Object) | Gets the Type of the current instance. | 
|  ToString | Format a .NET style exception string. Include all errors in the list, including any hints. | 
NpgsqlException Class | Npgsql Namespace