Concatenate Integer And Varchar

I have a table like this:

tbl_Projects
-------------------------
ProjID | Description
-------------------------
1 | First
2 | Second
3 | Third

I want to write a SELECT statement that will output in this format:
1 - First
2 - Second
etc...

I've tried these two statements:

SELECT (ProjID + ' - ' + Description) AS Projects
FROM tbl_Projects
//Error: Conversion failed when converting the varchar value 'First' to data type int.

and

SELECT CONCAT(ProjID, CONCAT(' - ', Description)) AS Projects
FROM tbl_Projects
//Error: The data types int and varchar are incompatible in the concat operator.

Is there any way to concatenate an int value with a varchar value?