diff --git a/src/MongoDB.Bson/ObjectModel/Decimal128.cs b/src/MongoDB.Bson/ObjectModel/Decimal128.cs
index 0853fdf99e1..2b2ce4f816a 100644
--- a/src/MongoDB.Bson/ObjectModel/Decimal128.cs
+++ b/src/MongoDB.Bson/ObjectModel/Decimal128.cs
@@ -739,6 +739,14 @@ public static byte ToByte(Decimal128 d)
         /// <returns>A <see cref="decimal"/> equivalent to <paramref name="d" />.</returns>
         public static decimal ToDecimal(Decimal128 d)
         {
+            if (d == Decimal128.MaxValue)
+            {
+                return decimal.MaxValue;
+            }
+            else if (d == Decimal128.MinValue)
+            {
+                return decimal.MinValue;
+            }
             if (Flags.IsFirstForm(d._highBits))
             {
                 if (Decimal128.Compare(d, __minDecimalValue) < 0 || Decimal128.Compare(d, __maxDecimalValue) > 0)
diff --git a/tests/MongoDB.Bson.Tests/ObjectModel/Decimal128Tests.cs b/tests/MongoDB.Bson.Tests/ObjectModel/Decimal128Tests.cs
index 10cd3c5aa52..5b8b1a6c665 100644
--- a/tests/MongoDB.Bson.Tests/ObjectModel/Decimal128Tests.cs
+++ b/tests/MongoDB.Bson.Tests/ObjectModel/Decimal128Tests.cs
@@ -76,6 +76,8 @@ public void Decimal(string valueString, string expectedResult)
         [InlineData("1E-99", "0")]
         [InlineData("1E-6111", "0")]
         [InlineData("10000.0000000000000000000000001", "10000.000000000000000000000000")] // see: CSHARP-2001
+        [InlineData("9999999999999999999999999999999999E+6111", "79228162514264337593543950335")] // see: CSHARP-5792
+        [InlineData("-9999999999999999999999999999999999E+6111", "-79228162514264337593543950335")]
         public void ToDecimal_should_return_expected_result(string valueString, string expectedResultString)
         {
             var subject = Decimal128.Parse(valueString);
diff --git a/tests/MongoDB.Bson.Tests/Serialization/Options/RepresentationConverterTests.cs b/tests/MongoDB.Bson.Tests/Serialization/Options/RepresentationConverterTests.cs
index 0bed83d83e3..f69fcbbe9fc 100644
--- a/tests/MongoDB.Bson.Tests/Serialization/Options/RepresentationConverterTests.cs
+++ b/tests/MongoDB.Bson.Tests/Serialization/Options/RepresentationConverterTests.cs
@@ -119,6 +119,15 @@ public void TestConversions()
             Assert.Equal((long)(ulong)int.MaxValue, converter.ToInt64(int.MaxValue));
             Assert.Equal(1UL, converter.ToUInt64((long)1));
             Assert.Equal((long)(ulong)long.MaxValue, converter.ToInt64(long.MaxValue));
+
+            // general decimal <-> Decimal128 checks
+            Assert.Equal(123.45m, converter.ToDecimal(new Decimal128(123.45m)));
+            Assert.Equal(-123.45m, converter.ToDecimal(new Decimal128(-123.45m)));
+            // System.Decimal should be mapped to Decimal128.MaxValue and vice versa
+            Assert.Equal(Decimal128.MaxValue, converter.ToDecimal128(decimal.MaxValue));
+            Assert.Equal(Decimal128.MinValue, converter.ToDecimal128(decimal.MinValue));
+            Assert.Equal(decimal.MaxValue, converter.ToDecimal(Decimal128.MaxValue));
+            Assert.Equal(decimal.MinValue, converter.ToDecimal(Decimal128.MinValue));
         }
 
         [Theory]