diff --git a/src/libraries/Microsoft.Bcl.Cryptography/src/System/Security/Cryptography/NetStandardShims.cs b/src/libraries/Microsoft.Bcl.Cryptography/src/System/Security/Cryptography/NetStandardShims.cs
index 1e81d7a01b023c..d35c4738c5cb6e 100644
--- a/src/libraries/Microsoft.Bcl.Cryptography/src/System/Security/Cryptography/NetStandardShims.cs
+++ b/src/libraries/Microsoft.Bcl.Cryptography/src/System/Security/Cryptography/NetStandardShims.cs
@@ -100,25 +100,14 @@ internal static bool TryGetHashAndReset(
             Span<byte> destination,
             out int bytesWritten)
         {
-            int hashSize = hash.AlgorithmName.Name switch
-            {
-                nameof(HashAlgorithmName.MD5) => 128 >> 3,
-                nameof(HashAlgorithmName.SHA1) => 160 >> 3,
-                nameof(HashAlgorithmName.SHA256) => 256 >> 3,
-                nameof(HashAlgorithmName.SHA384) => 384 >> 3,
-                nameof(HashAlgorithmName.SHA512) => 512 >> 3,
-                _ => throw new CryptographicException(),
-            };
-
-            if (destination.Length < hashSize)
+            byte[] actual = hash.GetHashAndReset();
+
+            if (destination.Length < actual.Length)
             {
                 bytesWritten = 0;
                 return false;
             }
 
-            byte[] actual = hash.GetHashAndReset();
-            Debug.Assert(actual.Length == hashSize);
-
             actual.AsSpan().CopyTo(destination);
             bytesWritten = actual.Length;
             return true;