SQL - how to conditional add space when append a string

I have
a.[Name] + ' ' + a.[MiddleName] + ' ' + a.[SurName] As Name

This will create a string with one spacing between words

However when a.[MiddleName] is empty, I will have two spaces between Name and SurName.  How can I structure the above so there will be only a single space if MiddleName is empty
tommym121Asked:
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wdosanjosCommented:
Please try:

a.[Name] + ' ' + (case when a.[MiddleName] = '' then '' else a.[MiddleName] + ' ' end) + a.[SurName] As Name
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tommym121Author Commented:
Thanks.
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Microsoft SQL Server

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