Align BitConverter/BinaryPrimitives usage netfx/netcore (#2963)

Author: MichelZ

src/Microsoft.Data.SqlClient/netfx/src/Microsoft/Data/SqlClient/TdsParser.cs

@@ -4,6 +4,7 @@
 
 using System;
 using System.Buffers;
+using System.Buffers.Binary;
 using System.Collections.Generic;
 using System.Data;
 using System.Data.SqlTypes;
@@ -4403,8 +4404,8 @@ private TdsOperationStatus TryProcessFedAuthInfo(TdsParserStateObject stateObj,
                     uint currentOptionOffset = checked(i * optionSize);
 
                     byte id = tokenData[currentOptionOffset];
-                    uint dataLen = BitConverter.ToUInt32(tokenData, checked((int)(currentOptionOffset + 1)));
-                    uint dataOffset = BitConverter.ToUInt32(tokenData, checked((int)(currentOptionOffset + 5)));
+                    uint dataLen = BinaryPrimitives.ReadUInt32LittleEndian(tokenData.AsSpan(checked((int)(currentOptionOffset + 1))));
+                    uint dataOffset = BinaryPrimitives.ReadUInt32LittleEndian(tokenData.AsSpan(checked((int)(currentOptionOffset + 5))));
                     if (SqlClientEventSource.Log.IsAdvancedTraceOn())
                     {
                         SqlClientEventSource.Log.AdvancedTraceEvent("<sc.TdsParser.TryProcessFedAuthInfo> FedAuthInfoOpt: ID={0}, DataLen={1}, Offset={2}", id, dataLen.ToString(CultureInfo.InvariantCulture), dataOffset.ToString(CultureInfo.InvariantCulture));
@@ -6830,7 +6831,7 @@ internal bool DeserializeUnencryptedValue(SqlBuffer value, byte[] unencryptedByt
                         return false;
                     }
 
-                    longValue = BitConverter.ToInt64(unencryptedBytes, 0);
+                    longValue = BinaryPrimitives.ReadInt64LittleEndian(unencryptedBytes);
 
                     if (tdsType == TdsEnums.SQLBIT ||
                         tdsType == TdsEnums.SQLBITN)
@@ -6868,7 +6869,7 @@ internal bool DeserializeUnencryptedValue(SqlBuffer value, byte[] unencryptedByt
                         return false;
                     }
 
-                    singleValue = BitConverter.ToSingle(unencryptedBytes, 0);
+                    singleValue = BitConverterCompatible.Int32BitsToSingle(BinaryPrimitives.ReadInt32LittleEndian(unencryptedBytes));
                     value.Single = singleValue;
                     break;
 
@@ -6879,7 +6880,7 @@ internal bool DeserializeUnencryptedValue(SqlBuffer value, byte[] unencryptedByt
                         return false;
                     }
 
-                    doubleValue = BitConverter.ToDouble(unencryptedBytes, 0);
+                    doubleValue = BitConverter.Int64BitsToDouble(BinaryPrimitives.ReadInt64LittleEndian(unencryptedBytes));
                     value.Double = doubleValue;
                     break;
 
@@ -6896,8 +6897,8 @@ internal bool DeserializeUnencryptedValue(SqlBuffer value, byte[] unencryptedByt
                             return false;
                         }
 
-                        mid = BitConverter.ToInt32(unencryptedBytes, 0);
-                        lo = BitConverter.ToUInt32(unencryptedBytes, 4);
+                        mid = BinaryPrimitives.ReadInt32LittleEndian(unencryptedBytes);
+                        lo = BinaryPrimitives.ReadUInt32LittleEndian(unencryptedBytes.AsSpan(4));
 
                         long l = (((long)mid) << 0x20) + ((long)lo);
                         value.SetToMoney(l);
@@ -6934,8 +6935,8 @@ internal bool DeserializeUnencryptedValue(SqlBuffer value, byte[] unencryptedByt
                         return false;
                     }
 
-                    daypart = BitConverter.ToInt32(unencryptedBytes, 0);
-                    timepart = BitConverter.ToUInt32(unencryptedBytes, 4);
+                    daypart = BinaryPrimitives.ReadInt32LittleEndian(unencryptedBytes);
+                    timepart = BinaryPrimitives.ReadUInt32LittleEndian(unencryptedBytes.AsSpan(4));
                     value.SetToDateTime(daypart, (int)timepart);
                     break;