disabling warnings.

Author: Daniel Lemire

src/Base64Scalar.cs

@@ -42,6 +42,7 @@ public static int MaximalBinaryLengthFromBase64Scalar<T>(ReadOnlySpan<T> input)
             int length = input.Length;
             if (length > 0)
             {
+#pragma warning disable CS8602
                 if (input[length - 1].Equals('='))
                 {
                     padding++;

test/Base64DecodingTestsUTF16.cs

@@ -27,7 +27,7 @@ protected static void DecodeBase64CasesUTF16(DecodeFromBase64DelegateFncFromUTF1
             byte[] buffer = new byte[Base64.MaximalBinaryLengthFromBase64Scalar<char>(cases[i].AsSpan())];
             int bytesConsumed;
             int bytesWritten;
-
+#pragma warning disable CA1062
             var result = DecodeFromBase64Delegate(cases[i], buffer, out bytesConsumed, out bytesWritten, false);
 
             Assert.Equal(expectedResults[i].Item1, result);
@@ -64,8 +64,8 @@ protected static void CompleteDecodeBase64CasesUTF16(Base64WithWhiteSpaceToBinar
             ReadOnlySpan<char> base64Span = new ReadOnlySpan<char>(base64.ToCharArray());
             int bytesConsumed;
             int bytesWritten;
-
             byte[] buffer = new byte[Base64.MaximalBinaryLengthFromBase64Scalar<char>(base64Span)];
+#pragma warning disable CA1062
             var result = Base64WithWhiteSpaceToBinaryFromUTF16(base64Span, buffer, out bytesConsumed, out bytesWritten, true);
             Assert.Equal(OperationStatus.Done, result);
             Assert.Equal(decoded.Length, bytesWritten);
@@ -81,8 +81,8 @@ protected static void CompleteDecodeBase64CasesUTF16(Base64WithWhiteSpaceToBinar
             ReadOnlySpan<char> base64Span = new ReadOnlySpan<char>(base64.ToCharArray());
             int bytesConsumed;
             int bytesWritten;
-
             byte[] buffer = new byte[Base64.MaximalBinaryLengthFromBase64Scalar<char>(base64Span)];
+#pragma warning disable CA1062
             var result = DecodeFromBase64DelegateSafeFromUTF16(base64Span, buffer, out bytesConsumed, out bytesWritten, false);
             Assert.Equal(OperationStatus.Done, result);
             Assert.Equal(decoded.Length, bytesWritten);
@@ -264,8 +264,8 @@ protected void RoundtripBase64UTF16(Base64WithWhiteSpaceToBinaryFromUTF16 Base64
             string base64String = Convert.ToBase64String(source);
 
             byte[] decodedBytes = new byte[len];
-
             int bytesConsumed, bytesWritten;
+#pragma warning disable CA1062
             var result = Base64WithWhiteSpaceToBinaryFromUTF16(
                 base64String.ToCharArray(), decodedBytes.AsSpan(),
                 out bytesConsumed, out bytesWritten, isUrl: false);