Add EqualsIgnoreCase method to StringExtensions

csharp/Platform.Collections.Tests/StringTests.cs

@@ -21,5 +21,20 @@ public static void TrimSingleTest()
             Assert.Equal("hello", "hello'".TrimSingle('\''));
             Assert.Equal("hello", "'hello".TrimSingle('\''));
         }
+
+        [Fact]
+        public static void EqualsIgnoreCaseTest()
+        {
+            Assert.True("Hello".EqualsIgnoreCase("hello"));
+            Assert.True("HELLO".EqualsIgnoreCase("hello"));
+            Assert.True("hello".EqualsIgnoreCase("HELLO"));
+            Assert.True("Hello World".EqualsIgnoreCase("HELLO WORLD"));
+            Assert.True("".EqualsIgnoreCase(""));
+            Assert.False("Hello".EqualsIgnoreCase("World"));
+            Assert.False("Hello".EqualsIgnoreCase("Hell"));
+            Assert.False("Hello".EqualsIgnoreCase(null!));
+            Assert.False(((string?)null).EqualsIgnoreCase("Hello"));
+            Assert.True(((string?)null).EqualsIgnoreCase(null));
+        }
     }
 }

csharp/Platform.Collections/StringExtensions.cs

@@ -73,6 +73,27 @@ public static string CapitalizeFirstLetter(this string @string)
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public static string Truncate(this string @string, int maxLength) => string.IsNullOrEmpty(@string) ? @string : @string.Substring(0, Math.Min(@string.Length, maxLength));
 
+        /// <summary>
+        /// <para>
+        /// Determines whether the specified string equals another string ignoring case.
+        /// </para>
+        /// <para></para>
+        /// </summary>
+        /// <param name="@string">
+        /// <para>The string.</para>
+        /// <para></para>
+        /// </param>
+        /// <param name="other">
+        /// <para>The other string to compare with.</para>
+        /// <para></para>
+        /// </param>
+        /// <returns>
+        /// <para>True if the strings are equal ignoring case; otherwise, false.</para>
+        /// <para></para>
+        /// </returns>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static bool EqualsIgnoreCase(this string @string, string other) => string.Equals(@string, other, StringComparison.OrdinalIgnoreCase);
+
         /// <summary>
         /// <para>
         /// Trims the single using the specified string.