/// <include file='doc\WindowsPrincipal.uex' path='docs/doc[@for="WindowsPrincipal.IsInRole"]/*' />
public virtual bool IsInRole(String role)
{
if (role == null)
{
return(false);
}
if (!m_rolesLoaded)
{
lock (this)
{
if (!m_rolesLoaded)
{
m_roles = m_identity.GetRoles();
if (m_roles != null && m_roles.Length > MAGIC_NUMBER)
{
m_rolesTable = new Hashtable(m_roles.Length, 1.0f, s_provider, s_comparer);
for (int i = 0; i < m_roles.Length; ++i)
{
try
{
if (m_roles[i] != null)
{
m_rolesTable.Add(m_roles[i], m_roles[i]);
}
}
catch (ArgumentException)
{
}
}
m_roles = null;
}
m_rolesLoaded = true;
}
}
}
if (m_rolesLoaded && m_roles == null && m_rolesTable == null)
{
return(false);
}
if (m_rolesTable != null)
{
return(m_rolesTable.Contains(role));
}
for (int i = 0; i < m_roles.Length; ++i)
{
if (m_roles[i] != null && String.Compare(m_roles[i], role, true, CultureInfo.InvariantCulture) == 0)
{
return(true);
}
}
return(false);
}