diff --git a/src/libraries/System.Security.Cryptography.Csp/src/System/Security/Cryptography/CapiHelper.DSA.Shared.cs b/src/libraries/System.Security.Cryptography.Csp/src/System/Security/Cryptography/CapiHelper.DSA.Shared.cs
index 069813579789a..4e6b8e0577889 100644
--- a/src/libraries/System.Security.Cryptography.Csp/src/System/Security/Cryptography/CapiHelper.DSA.Shared.cs
+++ b/src/libraries/System.Security.Cryptography.Csp/src/System/Security/Cryptography/CapiHelper.DSA.Shared.cs
@@ -178,7 +178,7 @@ internal static DSAParameters ToDSAParameters(this byte[] cspBlob, bool includeP
                         //  BYTE[lenP]      Y
                         //  BYTE[lenX]      X (if private)
 
-                        int magic = br.ReadInt32(); // Expected to be DSS_PUB_MAGIC_VER3 or DSS_PRIV_MAGIC_VER3
+                        br.ReadInt32(); // Expected to be DSS_PUB_MAGIC_VER3 or DSS_PRIV_MAGIC_VER3
                         int lenP = (br.ReadInt32() + 7) / 8;
                         int lenQ = (br.ReadInt32() + 7) / 8;
                         int lenJ = (br.ReadInt32() + 7) / 8;
@@ -220,7 +220,7 @@ internal static DSAParameters ToDSAParameters(this byte[] cspBlob, bool includeP
                         //  DWORD           counter (DSSSEED)
                         //  BYTE[20]        seed (DSSSEED)
 
-                        int magic = br.ReadInt32();    // Expected to be DSS_MAGIC or DSS_PRIVATE_MAGIC
+                        br.ReadInt32();    // Expected to be DSS_MAGIC or DSS_PRIVATE_MAGIC
                         int len = (br.ReadInt32() + 7) / 8;
                         dsaParameters.P = br.ReadReversed(len);
                         dsaParameters.Q = br.ReadReversed(DSS_Q_LEN);
@@ -279,7 +279,7 @@ private static void ReadKeyBlobHeader(BinaryReader br, out byte bVersion)
             //  WORD   reserved
             //  ALG_ID aiKeyAlg
 
-            byte bType = br.ReadByte();    // BLOBHEADER.bType: Expected to be 0x6 (PUBLICKEYBLOB) or 0x7 (PRIVATEKEYBLOB), though there's no check for backward compat reasons.
+            br.ReadByte();    // BLOBHEADER.bType: Expected to be 0x6 (PUBLICKEYBLOB) or 0x7 (PRIVATEKEYBLOB), though there's no check for backward compat reasons.
             bVersion = br.ReadByte();      // BLOBHEADER.bVersion: Expected to be 0x2 or 0x3, though there's no check for backward compat reasons.
             br.BaseStream.Position += sizeof(ushort); // BLOBHEADER.wReserved
             int algId = br.ReadInt32();    // BLOBHEADER.aiKeyAlg
diff --git a/src/libraries/System.Security.Cryptography.Csp/src/System/Security/Cryptography/CapiHelper.Shared.cs b/src/libraries/System.Security.Cryptography.Csp/src/System/Security/Cryptography/CapiHelper.Shared.cs
index 700d6e48a53f8..a75758092ef17 100644
--- a/src/libraries/System.Security.Cryptography.Csp/src/System/Security/Cryptography/CapiHelper.Shared.cs
+++ b/src/libraries/System.Security.Cryptography.Csp/src/System/Security/Cryptography/CapiHelper.Shared.cs
@@ -162,14 +162,14 @@ internal static RSAParameters ToRSAParameters(this byte[] cspBlob, bool includeP
             {
                 BinaryReader br = new BinaryReader(new MemoryStream(cspBlob));
 
-                byte bType = br.ReadByte();    // BLOBHEADER.bType: Expected to be 0x6 (PUBLICKEYBLOB) or 0x7 (PRIVATEKEYBLOB), though there's no check for backward compat reasons.
-                byte bVersion = br.ReadByte(); // BLOBHEADER.bVersion: Expected to be 0x2, though there's no check for backward compat reasons.
+                br.ReadByte();    // BLOBHEADER.bType: Expected to be 0x6 (PUBLICKEYBLOB) or 0x7 (PRIVATEKEYBLOB), though there's no check for backward compat reasons.
+                br.ReadByte(); // BLOBHEADER.bVersion: Expected to be 0x2, though there's no check for backward compat reasons.
                 br.ReadUInt16();               // BLOBHEADER.wReserved
                 int algId = br.ReadInt32();    // BLOBHEADER.aiKeyAlg
                 if (algId != CALG_RSA_KEYX && algId != CALG_RSA_SIGN)
                     throw new PlatformNotSupportedException();  // The FCall this code was ported from supports other algid's but we're only porting what we use.
 
-                int magic = br.ReadInt32();    // RSAPubKey.magic: Expected to be 0x31415352 ('RSA1') or 0x32415352 ('RSA2')
+                br.ReadInt32();    // RSAPubKey.magic: Expected to be 0x31415352 ('RSA1') or 0x32415352 ('RSA2')
                 int bitLen = br.ReadInt32();   // RSAPubKey.bitLen
 
                 int modulusLength = bitLen / 8;