Fix mistake in .props

Wrong syntax

Author: craigfowler

Tools/Version.props

@@ -7,8 +7,8 @@
         <BuildNumber Condition="'$(BuildNumber)' == ''">0</BuildNumber>
         <VersionPrefix>2.0.0</VersionPrefix>
         <VersionSuffix>dev.$(BuildNumber)</VersionSuffix>
-        <Version Condition="'$(VersionSuffix)' != '' && '$(Version)' == ''">$(VersionPrefix)-$(VersionSuffix)</Version>
-        <Version Condition="'$(VersionSuffix)' == '' && '$(Version)' == ''">$(VersionPrefix)</Version>
+        <Version Condition="'$(VersionSuffix)' != '' And '$(Version)' == ''">$(VersionPrefix)-$(VersionSuffix)</Version>
+        <Version Condition="'$(VersionSuffix)' == '' And '$(Version)' == ''">$(VersionPrefix)</Version>
         <AssemblyVersion>$(VersionPrefix).$(BuildNumber)</AssemblyVersion>
         <FileVersion>$(AssemblyVersion)</FileVersion>
         <InformationalVersion>$(Version)+commit$(SourceRevisionId)</InformationalVersion>