private bool TryParseVersionQualifier(char qualifierchar, out VersionQualifier qualifier)
{
switch (qualifierchar)
{
case '*':
qualifier = VersionQualifier.Any;
return(true);
case '=':
qualifier = VersionQualifier.Equal;
return(true);
case '>':
qualifier = VersionQualifier.Greater;
return(true);
case '<':
qualifier = VersionQualifier.Lower;
return(true);
default:
qualifier = default(VersionQualifier);
return(false);
}
}
public PackageVersion(string name)
{
if (string.IsNullOrEmpty(name))
{
throw new ArgumentNullException("name");
}
VersionQualifier qualifier = VersionQualifier.Equal;
char qualifierchar = name[0];
bool qualifierinname = this.TryParseVersionQualifier(qualifierchar, out qualifier);
if (qualifier == VersionQualifier.Any && name.Length > 1)
{
throw new ArgumentException("Name is not valid.", "name");
}
if (qualifier != VersionQualifier.Any && name.Length < 2)
{
throw new ArgumentException("Name is not valid.", "name");
}
if (qualifierinname)
{
this.Number = name.Substring(1);
}
else
{
this.Number = name;
}
this.Qualifier = qualifier;
this.Name = name;
}
