diff --git a/src/SmartFormat/Core/Parsing/Parser.cs b/src/SmartFormat/Core/Parsing/Parser.cs
index 9cbfc6a6..4ba977d5 100644
--- a/src/SmartFormat/Core/Parsing/Parser.cs
+++ b/src/SmartFormat/Core/Parsing/Parser.cs
@@ -856,7 +856,7 @@ private Format HandleParsingErrors(ParsingErrors parsingErrors, Format currentRe
                 // Placeholder without issues are left unmodified
                 for (var i = 0; i < currentResult.Items.Count; i++)
                 {
-                    if (currentResult.Items[i] is Placeholder ph && parsingErrors.Issues.Any(errItem => errItem.Index >= currentResult.Items[i].StartIndex && errItem.Index <= currentResult.Items[i].EndIndex))
+                    if (currentResult.Items[i] is Placeholder ph && parsingErrors.Issues.Exists(errItem => errItem.Index >= currentResult.Items[i].StartIndex && errItem.Index <= currentResult.Items[i].EndIndex))
                     {
                         var parent = ph.Format ?? FormatPool.Instance.Get().Initialize(Settings, ph.BaseString);
                         currentResult.Items[i] = LiteralTextPool.Instance.Get().Initialize(Settings, parent, parent.BaseString, ph.StartIndex, ph.EndIndex);
@@ -867,7 +867,7 @@ private Format HandleParsingErrors(ParsingErrors parsingErrors, Format currentRe
                 // Replace erroneous Placeholders with an empty LiteralText
                 for (var i = 0; i < currentResult.Items.Count; i++)
                 {
-                    if (currentResult.Items[i] is Placeholder ph && parsingErrors.Issues.Any(errItem => errItem.Index >= currentResult.Items[i].StartIndex && errItem.Index <= currentResult.Items[i].EndIndex))
+                    if (currentResult.Items[i] is Placeholder ph && parsingErrors.Issues.Exists(errItem => errItem.Index >= currentResult.Items[i].StartIndex && errItem.Index <= currentResult.Items[i].EndIndex))
                     {
                         var parent = ph.Format ?? FormatPool.Instance.Get().Initialize(Settings, ph.BaseString);
                         currentResult.Items[i] = LiteralTextPool.Instance.Get().Initialize(Settings, parent, parent.BaseString, ph.StartIndex, ph.StartIndex);
@@ -884,4 +884,4 @@ private Format HandleParsingErrors(ParsingErrors parsingErrors, Format currentRe
     }
 
     #endregion
-}
\ No newline at end of file
+}
diff --git a/src/SmartFormat/Core/Settings/ParserSettings.cs b/src/SmartFormat/Core/Settings/ParserSettings.cs
index 8eec8d8f..f454d302 100644
--- a/src/SmartFormat/Core/Settings/ParserSettings.cs
+++ b/src/SmartFormat/Core/Settings/ParserSettings.cs
@@ -82,7 +82,7 @@ public void AddCustomOperatorChars(IList<char> characters)
     {
         foreach (var c in characters)
         {
-            if(DisallowedSelectorChars().Where(_ => OperatorChars().All(ch => ch != c)).Contains(c) ||
+            if(DisallowedSelectorChars().Where(_ => OperatorChars().TrueForAll(ch => ch != c)).Contains(c) ||
                SelectorChars().Contains(c) || CustomSelectorChars().Contains(c))
                 throw new ArgumentException($"Cannot add '{c}' as a custom operator character. It is disallowed or in use as a selector.");
 
@@ -190,4 +190,4 @@ public void AddCustomOperatorChars(IList<char> characters)
         FormatterNameSeparator, FormatterOptionsBeginChar, FormatterOptionsEndChar, PlaceholderBeginChar,
         PlaceholderEndChar
     };
-}
\ No newline at end of file
+}
diff --git a/src/SmartFormat/Extensions/ChooseFormatter.cs b/src/SmartFormat/Extensions/ChooseFormatter.cs
index 012a5af9..ca32b0d8 100644
--- a/src/SmartFormat/Extensions/ChooseFormatter.cs
+++ b/src/SmartFormat/Extensions/ChooseFormatter.cs
@@ -48,7 +48,7 @@ public bool TryEvaluateFormat(IFormattingInfo formattingInfo)
         var formats = formattingInfo.Format?.Split(SplitChar);
             
         // Check whether arguments can be handled by this formatter
-        if (formats is null || formats.Count < 2 || chooseOptions is null)
+        if (formats is null || formats.Count < 2)
         {
             // Auto detection calls just return a failure to evaluate
             if (string.IsNullOrEmpty(formattingInfo.Placeholder?.FormatterName))
diff --git a/src/SmartFormat/SmartFormatter.cs b/src/SmartFormat/SmartFormatter.cs
index 78f4ff03..a897d221 100644
--- a/src/SmartFormat/SmartFormatter.cs
+++ b/src/SmartFormat/SmartFormatter.cs
@@ -95,7 +95,7 @@ public SmartFormatter AddExtensions(params ISource[] sourceExtensions)
             _ = InsertExtension(index, source);
 
             // Also add the class as a formatter, if possible
-            if (source is IFormatter formatter && FormatterExtensions.All(fx => fx.GetType() != formatter.GetType())) AddExtensions(formatter);
+            if (source is IFormatter formatter && FormatterExtensions.TrueForAll(fx => fx.GetType() != formatter.GetType())) AddExtensions(formatter);
         }
 
         return this;
@@ -123,7 +123,7 @@ public SmartFormatter AddExtensions(params IFormatter[] formatterExtensions)
             _ = InsertExtension(index, formatter);
 
             // Also add the class as a source, if possible
-            if (formatter is ISource source && SourceExtensions.All(sx => sx.GetType() != source.GetType())) AddExtensions(source);
+            if (formatter is ISource source && SourceExtensions.TrueForAll(sx => sx.GetType() != source.GetType())) AddExtensions(source);
         }
 
         return this;
@@ -144,7 +144,7 @@ public SmartFormatter AddExtensions(params IFormatter[] formatterExtensions)
     /// </exception>
     public SmartFormatter InsertExtension(int position, ISource sourceExtension)
     {
-        if (_sourceExtensions.Any(sx => sx.GetType() == sourceExtension.GetType())) return this;
+        if (_sourceExtensions.Exists(sx => sx.GetType() == sourceExtension.GetType())) return this;
 
         if (sourceExtension is IInitializer sourceToInitialize)
             sourceToInitialize.Initialize(this);
@@ -169,10 +169,10 @@ public SmartFormatter InsertExtension(int position, ISource sourceExtension)
     /// </exception>
     public SmartFormatter InsertExtension(int position, IFormatter formatterExtension)
     {
-        if (_formatterExtensions.Any(sx => sx.GetType() == formatterExtension.GetType())) return this;
+        if (_formatterExtensions.Exists(sx => sx.GetType() == formatterExtension.GetType())) return this;
 
         // Extension name is in use by a different type
-        if(_formatterExtensions.Any(fx => fx.Name.Equals(formatterExtension.Name)))
+        if(_formatterExtensions.Exists(fx => fx.Name.Equals(formatterExtension.Name)))
             throw new ArgumentException($"Formatter '{formatterExtension.GetType().Name}' uses existing name.", nameof(formatterExtension));
 
         if (formatterExtension is IInitializer formatterToInitialize)