diff --git a/stock_indicators/_cslib/__init__.py b/stock_indicators/_cslib/__init__.py
index 4297ec2a..980f3c5d 100644
--- a/stock_indicators/_cslib/__init__.py
+++ b/stock_indicators/_cslib/__init__.py
@@ -51,6 +51,3 @@
 from Skender.Stock.Indicators import PivotPointType as CsPivotPointType
 from Skender.Stock.Indicators import PivotTrend as CsPivotTrend
 from Skender.Stock.Indicators import Match as CsMatch
-
-# Exceptions
-from System import FormatException as CsFormatException
diff --git a/stock_indicators/_cstypes/datetime.py b/stock_indicators/_cstypes/datetime.py
index 83833c9e..8ffb0f3f 100644
--- a/stock_indicators/_cstypes/datetime.py
+++ b/stock_indicators/_cstypes/datetime.py
@@ -20,8 +20,7 @@ class DateTime:
         3/26/2021 10:02:22 PM
     """
     def __new__(cls, datetime) -> CsDateTime:
-        if isinstance(datetime, PyDateTime):
-            return CsDateTime.Parse(datetime.isoformat())
+        return CsDateTime.Parse(datetime.isoformat())
 
 
 def to_pydatetime(cs_datetime):
@@ -31,5 +30,4 @@ def to_pydatetime(cs_datetime):
     Parameter:
         cs_datetime : `System.DateTime` of C#.
     """
-    if isinstance(cs_datetime, CsDateTime):
-        return PyDateTime.fromisoformat(cs_datetime.ToString("s", CsCultureInfo.InvariantCulture))
+    return PyDateTime.fromisoformat(cs_datetime.ToString("s", CsCultureInfo.InvariantCulture))
diff --git a/stock_indicators/_cstypes/decimal.py b/stock_indicators/_cstypes/decimal.py
index a3bd9b75..4d7f81fe 100644
--- a/stock_indicators/_cstypes/decimal.py
+++ b/stock_indicators/_cstypes/decimal.py
@@ -1,9 +1,9 @@
 from decimal import Decimal as PyDecimal
 
 from stock_indicators._cslib import CsDecimal
-from stock_indicators._cslib import CsFormatException
 from stock_indicators._cslib import CsCultureInfo
 
+
 class Decimal:
     """
     Class for converting a number into C#'s `System.Decimal` class.
@@ -19,11 +19,7 @@ class Decimal:
         2.5
     """
     def __new__(cls, decimal) -> CsDecimal:
-        try:
-            return CsDecimal.Parse(str(decimal), CsCultureInfo.InvariantCulture)
-        except CsFormatException as e:
-            raise ValueError("You may be using numeric data that is incompatible with your locale environment settings.\n"
-                             "For example, you may be using decimal points instead of commas.") from e
+        return CsDecimal.Parse(str(decimal), CsCultureInfo.InvariantCulture)
 
 
 def to_pydecimal(cs_decimal):
diff --git a/stock_indicators/indicators/common/candles.py b/stock_indicators/indicators/common/candles.py
index d1da59f8..a6345fab 100644
--- a/stock_indicators/indicators/common/candles.py
+++ b/stock_indicators/indicators/common/candles.py
@@ -59,7 +59,6 @@ def is_bearish(self) -> bool:
 
 class CandleProperties(generate_cs_inherited_class(_CandleProperties, CsCandleProperties)):
     """An extended version of Quote that contains additional calculated properties."""
-    pass
 
 
 class CandleResult(ResultBase):
diff --git a/stock_indicators/indicators/vwap.py b/stock_indicators/indicators/vwap.py
index 7833da69..cec0e32e 100644
--- a/stock_indicators/indicators/vwap.py
+++ b/stock_indicators/indicators/vwap.py
@@ -42,7 +42,7 @@ def get_vwap(quotes, start = None, month = 1, day = 1, hour = 0, minute = 0):
     if isinstance(start, int):
         start = datetime(start, month, day, hour, minute)
 
-    results = CsIndicator.GetVwap[Quote](CsList(Quote, quotes), CsDateTime(start))
+    results = CsIndicator.GetVwap[Quote](CsList(Quote, quotes), CsDateTime(start) if start else None)
     return VWAPResults(results, VWAPResult)