/// <summary>
/// Delete prefix and associated namespace with it.
/// </summary>
/// <param name="prefixStr">Prefix</param>
/// <param name="fullStr">Namespace</param>
/// <returns>Returns 'True' if operation completed succeful, 'False' otherwise.</returns>
public bool DeletePrefix(string prefixStr, string fullStr)
{
var val = TriplePrefixes.FirstOrDefault(x => x.Prefix == prefixStr && x.Namespace == fullStr);
if (val != null)
{
TriplePrefixes.Remove(val);
SaveChanges();
return(true);
}
return(false);
}