MSBuild Conditions

Article
11/15/2016

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MSBuild supports a specific set of conditions that can be applied wherever a Condition attribute is allowed. The following table explains those conditions.

Condition	Description
'`stringA`' == '`stringB`'	Evaluates to `true` if `stringA` equals `stringB`. For example: `Condition="'$(CONFIG)'=='DEBUG'"` Single quotes are not required for simple alphanumeric strings or boolean values. However, single quotes are required for empty values.
'`stringA`' != '`stringB`'	Evaluates to `true` if `stringA` is not equal to `stringB`. For example: `Condition="'$(CONFIG)'!='DEBUG'"` Single quotes are not required for simple alphanumeric strings or boolean values. However, single quotes are required for empty values.
<, >, <=, >=	Evaluates the numeric values of the operands. Returns `true` if the relational evaluation is true. Operands must evaluate to a decimal or hexadecimal number. Hexadecimal numbers must begin with "0x". Note: In XML, the characters `<` and `>` must be escaped. The symbol `<` is represented as `<`. The symbol `>` is represented as `>`.
Exists('`stringA`')	Evaluates to `true` if a file or folder with the name `stringA` exists. For example: `Condition="!Exists('$(builtdir)')"` Single quotes are not required for simple alphanumeric strings or boolean values. However, single quotes are required for empty values.
HasTrailingSlash('`stringA`')	Evaluates to `true` if the specified string contains either a trailing backward slash (\) or forward slash (/) character. For example: `Condition="!HasTrailingSlash('$(OutputPath)')"` Single quotes are not required for simple alphanumeric strings or boolean values. However, single quotes are required for empty values.
!	Evaluates to `true` if the operand evaluates to `false`.
And	Evaluates to `true` if both operands evaluate to `true`.
Or	Evaluates to `true` if at least one of the operands evaluates to `true`.
()	Grouping mechanism that evaluates to `true` if expressions contained inside evaluate to `true`.
$if$ ( %expression% ), $else$, $endif$	Checks whether the specified `%expression%` matches the string value of the passed custom template parameter. If the $if$ condition evaluates to `true`, then its statements are run; otherwise, the $else$ condition is checked. If the $else$ condition is `true`, then its statements are run; otherwise, the $endif$ condition ends expression evaluation. For examples of usage, see Visual Studio Project/Item Template Parameter Logic.

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MSBuild Conditions

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