/// <summary>
 /// Initializes the <see cref="CSF.Zpt.ExpressionEvaluators.CSharpExpressions.FallbackNamespaceConfiguration"/> class.
 /// </summary>
 static FallbackNamespaceConfiguration()
 {
     _default = new FallbackNamespaceConfiguration();
 }
 /// <summary>
 /// Initializes a new instance of the
 /// <see cref="CSF.Zpt.ExpressionEvaluators.CSharpExpressions.CSharpExpressionFactory"/> class.
 /// </summary>
 /// <param name="namespaceConfig">Namespace config.</param>
 public CSharpExpressionFactory(INamespaceConfiguration namespaceConfig = null)
 {
     _namespaceConfig = namespaceConfig?? GetAlternativeNamespaceConfiguration();
 }