When hashing the entire string, case sensitivity of hash and equals should be the same

Author: andrewjsaid

src/libraries/System.Collections.Immutable/src/System.Collections.Immutable.csproj

@@ -66,13 +66,10 @@ The System.Collections.Immutable library is built-in as part of the shared frame
     <Compile Include="System\Collections\Frozen\String\OrdinalStringFrozenSet_RightJustifiedCaseInsensitiveSubstring.cs" />
     <Compile Include="System\Collections\Frozen\String\OrdinalStringFrozenSet_RightJustifiedSubstring.cs" />
     <Compile Include="System\Collections\Frozen\String\OrdinalStringFrozenSet_RightJustifiedSingleChar.cs" />
-
-    <Compile Include="System\Collections\Frozen\String\OrdinalStringFrozenDictionary_FullCaseSensitiveHashCaseInsensitiveEquals.cs" />
     <Compile Include="System\Collections\Frozen\String\OrdinalStringFrozenDictionary_LeftJustifiedSingleCharCaseInsensitive.cs" />
     <Compile Include="System\Collections\Frozen\String\OrdinalStringFrozenDictionary_LeftJustifiedSubstringCaseInsensitive.cs" />
     <Compile Include="System\Collections\Frozen\String\OrdinalStringFrozenDictionary_RightJustifiedSingleCharCaseInsensitive.cs" />
     <Compile Include="System\Collections\Frozen\String\OrdinalStringFrozenDictionary_RightJustifiedSubstringCaseInsensitive.cs" />
-    <Compile Include="System\Collections\Frozen\String\OrdinalStringFrozenSet_FullCaseSensitiveHashCaseInsensitiveEquals.cs" />
     <Compile Include="System\Collections\Frozen\String\OrdinalStringFrozenSet_LeftJustifiedSingleCharCaseInsensitive.cs" />
     <Compile Include="System\Collections\Frozen\String\OrdinalStringFrozenSet_LeftJustifiedSubstringCaseInsensitive.cs" />
     <Compile Include="System\Collections\Frozen\String\OrdinalStringFrozenSet_RightJustifiedSingleCharCaseInsensitive.cs" />

src/libraries/System.Collections.Immutable/src/System/Collections/Frozen/FrozenDictionary.cs

@@ -238,9 +238,8 @@ private static FrozenDictionary<TKey, TValue> CreateFromDictionary<TKey, TValue>
                     }
                     else
                     {
-                        frozenDictionary = analysis.IgnoreCaseForEquals
-                            ? new OrdinalStringFrozenDictionary_FullCaseSensitiveHashCaseInsensitiveEquals<TValue>(keys, values, stringComparer, analysis.MinimumLength, analysis.MaximumLengthDiff)
-                            : new OrdinalStringFrozenDictionary_Full<TValue>(keys, values, stringComparer, analysis.MinimumLength, analysis.MaximumLengthDiff);
+                        // if (IgnoreCaseForEquals) => Can only be true if there are no letters, thus case sensitive comparison still works here.
+                        frozenDictionary = new OrdinalStringFrozenDictionary_Full<TValue>(keys, values, stringComparer, analysis.MinimumLength, analysis.MaximumLengthDiff);
                     }
                 }
 

src/libraries/System.Collections.Immutable/src/System/Collections/Frozen/FrozenSet.cs

@@ -186,9 +186,8 @@ private static FrozenSet<T> CreateFromSet<T>(HashSet<T> source)
                     }
                     else
                     {
-                        frozenSet = analysis.IgnoreCaseForEquals
-                                    ? new OrdinalStringFrozenSet_FullCaseSensitiveHashCaseInsensitiveEquals(entries, stringComparer, analysis.MinimumLength, analysis.MaximumLengthDiff)
-                                    : new OrdinalStringFrozenSet_Full(entries, stringComparer, analysis.MinimumLength, analysis.MaximumLengthDiff);
+                        // if (IgnoreCaseForEquals) => Can only be true if there are no letters, thus case sensitive comparison still works here.
+                        frozenSet = new OrdinalStringFrozenSet_Full(entries, stringComparer, analysis.MinimumLength, analysis.MaximumLengthDiff);
                     }
                 }