diff --git a/ClosedXML/Excel/PivotTables/XLPivotTable.cs b/ClosedXML/Excel/PivotTables/XLPivotTable.cs
index 0e20ea8..80124a0 100644
--- a/ClosedXML/Excel/PivotTables/XLPivotTable.cs
+++ b/ClosedXML/Excel/PivotTables/XLPivotTable.cs
@@ -44,6 +44,44 @@
 
         public IXLPivotTable SetTheme(XLPivotTableTheme value) { Theme = value; return this; }
 
+        private Boolean ValidateName(String newName, String oldName, out String message)
+        {
+            message = "";
+            if (String.IsNullOrWhiteSpace(newName))
+            {
+                message = $"The table name '{newName}' is invalid";
+                return false;
+            }
+
+            // Table names are case insensitive
+            if (!oldName.Equals(newName, StringComparison.OrdinalIgnoreCase)
+                && Worksheet.Tables.Any(t => t.Name.Equals(newName, StringComparison.OrdinalIgnoreCase)))
+            {
+                message = $"This worksheet already contains a table named '{newName}'";
+                return false;
+            }
+
+            if (newName[0] != '_' && !char.IsLetter(newName[0]))
+            {
+                message = $"The table name '{newName}' does not begin with a letter or an underscore";
+                return false;
+            }
+
+            if (newName.Length > 255)
+            {
+                message = "The table name is more than 255 characters";
+                return false;
+            }
+
+            if (new[] { 'C', 'R' }.Any(c => newName.ToUpper().Equals(c.ToString())))
+            {
+                message = $"The table name '{newName}' is invalid";
+                return false;
+            }
+
+            return true;
+        }
+
         public String Name
         {
             get { return _name; }
@@ -53,22 +91,8 @@
 
                 var oldname = _name ?? string.Empty;
 
-                if (String.IsNullOrWhiteSpace(value))
-                    throw new ArgumentException($"The table name '{value}' is invalid");
-
-                // Table names are case insensitive
-                if (!oldname.Equals(value, StringComparison.OrdinalIgnoreCase)
-                    && Worksheet.Tables.Any(t => t.Name.Equals(value, StringComparison.OrdinalIgnoreCase)))
-                    throw new ArgumentException($"This worksheet already contains a table named '{value}'");
-
-                if (value[0] != '_' && !char.IsLetter(value[0]))
-                    throw new ArgumentException($"The table name '{value}' does not begin with a letter or an underscore");
-
-                if (value.Length > 255)
-                    throw new ArgumentException("The table name is more than 255 characters");
-
-                if (new[] { 'C', 'R' }.Any(c => value.ToUpper().Equals(c.ToString())))
-                    throw new ArgumentException($"The table name '{value}' is invalid");
+                if (!ValidateName(value, oldname, out String message))
+                    throw new ArgumentException(message, nameof(value));
 
                 _name = value;
 
diff --git a/ClosedXML/Excel/Tables/XLTable.cs b/ClosedXML/Excel/Tables/XLTable.cs
index b1068d7..73df4a2 100644
--- a/ClosedXML/Excel/Tables/XLTable.cs
+++ b/ClosedXML/Excel/Tables/XLTable.cs
@@ -201,6 +201,44 @@
 
         public XLTableTheme Theme { get; set; }
 
+        private Boolean ValidateName(String newName, String oldName, out String message)
+        {
+            message = "";
+            if (String.IsNullOrWhiteSpace(newName))
+            {
+                message = $"The table name '{newName}' is invalid";
+                return false;
+            }
+
+            // Table names are case insensitive
+            if (!oldName.Equals(newName, StringComparison.OrdinalIgnoreCase)
+                && Worksheet.Tables.Any(t => t.Name.Equals(newName, StringComparison.OrdinalIgnoreCase)))
+            {
+                message = $"This worksheet already contains a table named '{newName}'";
+                return false;
+            }
+
+            if (newName[0] != '_' && !char.IsLetter(newName[0]))
+            {
+                message = $"The table name '{newName}' does not begin with a letter or an underscore";
+                return false;
+            }
+
+            if (newName.Length > 255)
+            {
+                message = "The table name is more than 255 characters";
+                return false;
+            }
+
+            if (new[] { 'C', 'R' }.Any(c => newName.ToUpper().Equals(c.ToString())))
+            {
+                message = $"The table name '{newName}' is invalid";
+                return false;
+            }
+
+            return true;
+        }
+
         public String Name
         {
             get { return _name; }
@@ -211,22 +249,8 @@
                 // Validation rules for table names
                 var oldname = _name ?? string.Empty;
 
-                if (String.IsNullOrWhiteSpace(value))
-                    throw new ArgumentException($"The table name '{value}' is invalid");
-
-                // Table names are case insensitive
-                if (!oldname.Equals(value, StringComparison.OrdinalIgnoreCase)
-                    && Worksheet.Tables.Any(t => t.Name.Equals(value, StringComparison.OrdinalIgnoreCase)))
-                    throw new ArgumentException($"This worksheet already contains a table named '{value}'");
-
-                if (value[0] != '_' && !char.IsLetter(value[0]))
-                    throw new ArgumentException($"The table name '{value}' does not begin with a letter or an underscore");
-
-                if (value.Length > 255)
-                    throw new ArgumentException("The table name is more than 255 characters");
-
-                if (new[] { 'C', 'R' }.Any(c => value.ToUpper().Equals(c.ToString())))
-                    throw new ArgumentException($"The table name '{value}' is invalid");
+                if (!ValidateName(value, oldname, out String message))
+                    throw new ArgumentException(message, nameof(value));
 
                 _name = value;