sql server get throw message string inside catch code example

Example 1: sql server throw exception

THROW 51000, 'The record does not exist.', 1;

Example 2: sql server throw exception

USE tempdb;  
GO  
CREATE TABLE dbo.TestRethrow  
(    ID INT PRIMARY KEY  
);  
BEGIN TRY  
    INSERT dbo.TestRethrow(ID) VALUES(1);  
--  Force error 2627, Violation of PRIMARY KEY constraint to be raised.  
    INSERT dbo.TestRethrow(ID) VALUES(1);  
END TRY  
BEGIN CATCH  
  
    PRINT 'In catch block.';  
    THROW;  
END CATCH;

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